8/12/2019 953009 T Yorkshire

1/32

Yorkshire Potable

integral solder

ring f it t ings

T h e d i f f e r e n c e i s q u a l i t y

CI/Sfb(59) Ih

8/12/2019 953009 T Yorkshire

2/32

IMI Yorkshire Fittings Limited has beenworking with copper and its alloys for overone hundred years. From our head office in

Stourton, Leeds, we have developed our ranges

of fittings and valves to such a degree that theyare now widely regarded as among the bestengineered products of their kind.

The first industrial use of our Stourton sitedates from 1888 when Elmores Depositing Co.manufactured copper tubes here. However, inthe early 1800s the site was a racecourse andthe venue for the St. Leger.

The Yorkshire connection began in 1909 whenElmores became the Yorkshire Copper Works(YCW), producing high quality condensertubing. The advent of the First World War sawa break in tube production as the companywas requisitioned to manufacture munitionsfor the war effort. However, by the 1920snormal production had resumed and, from the1930s, business boomed as copper enjoyedwidespread growth in domestic plumbingsystems. In the period following the launch ofits now world famous Yorkshire integral solderring fitting in 1934, the Yorkshire CopperWorks was so successful that in 1958 it mergedwith the ICI Metals Division to become known

as Yorkshire Imperial Metals(YIM

).

In 1968, Yorkshire Imperial Metals wasincorporated into the Building Products Groupof IMI plc, a major international industrialgroup and in 1986 took on its present identity

and the name IMI Yorkshire Fittings Limited.Since then we have developed from a companywith a largely UK focus to a major Europeansupplier with manufacturing, sales anddistribution operations throughout Europe,servicing domestic and export markets all overthe world.

Over the past one hundred years ourexperience of working with copper and itsalloys to develop solutions for pipeworksystem designers and installers has given usthe expertise to manufacture the highestquality products for industrial and domesticusers throughout the world. With YorkshirePotable integral solder ring fittings, Kuterlitecompression fittings, Endex end feed fittings,

Tectite push-fit fittings and J imtencompression fittings for MDPE pipe and thevalve ranges we offer a fitting for every

conceivable plumbing and heating application.

1888Elmores begin makingcopper tube.

1909The Yorkshire Copper Worksstarts production ofplumbing materials.

1934The Yorkshire range ofintegral solder ring fittings ispatented and launched.

1985IMI Yorkshire Fittings leads

the market with theintroduction of YorkshirePotable, the same tried andtested patterns but with anew tin/copper lead freesolder.

IMI Yorkshi re Fi tti ngs Li mi ted

P A G E T W O

THE YORKSHIRE COPPER WORKS

PONTEFRACT ROAD

LEEDS

8/12/2019 953009 T Yorkshire

3/32

IMI Yorkshire Fittings integral solder ringfitting, launched in 1934 and protected bypatent for 25 years, introduced a completely

new concept to plumbing and led to the

development of light gauge copper tubes.During manufacture an integral ring of highquality lead free solder is positioned in the wallof each capillary socket. The principle of capillaryattraction ensures that when heat is applied tothe exterior of the fitting, the solder is drawninto the gap between the tube and the fitting,forming a completely reliable joint without theneed for additional solder or end feeding.

Back in 1934, the uniqueness of the idea wasmatched by an unprecedented sales campaignby purposely trained staff who travelled thelength and breadth of the countrydemonstrating this revolutionary new fitting.From their specially equipped vans, theydemonstrated the principle of the Yorkshireintegral solder ring fitting to architects,plumbers merchants and tradesmen althoughthey would not mention how the solder wasinserted into the fitting which at that timewas a closely guarded secret.

Yorkshire integral solder ring fittings wereinitially produced from one mill on theStourton site, however demand for the fittingwas such that the construction of two more

mills followed in rapid succession. TodayYorkshire Potable integral solder ring fittingsare still manufactured exclusively in Leeds,although, with the range now comprising over900 different items in addition to high duty andlarge size fittings, valves, accessories andheating components, production is now basedon modern cellular manufacturing systems.

In response to concern by Governmentagencies regarding the potential risks associatedwith lead in drinking water, all the YorkshirePotable integral solder ring fittings manufactured

since 1985 have contained a lead-free solderand are marked YP (Yorkshire Potable). Thissolder was specially developed by thecompany and is now incorporated in BritishStandards. With its distinctive mark the

Yorkshire Potable range provides installers,specifiers and water companies with a visibleassurance that no lead solder is present in a

Yorkshire installation.

The popularity and practicality of theYorkshire integral solder ring fitting has neverwaned and its reputation for reliability has ledto it being installed in many prestigiousbuildings such as the Royal Armouries

Museum in Leeds and the Globe Theatre inLondon, as well as a host of Cunard luxuryliners.

Yorkshi re Potable fi tt i ngs

P A G E T H R E E

Contents

Pages two and threeIntroduction.

Page fourYorkshire today.

Page fiveA choice of materials and thebenefits of copper.

Pages six and sevenCompatible tube materials.

Pages eight and nineThe Yorkshire range.

Pages ten and elevenStandards, approvalsregulations and a guaranteeof quality and reliability.

Page twelveA step-by-step guide toinstalling Yorkshire fittings.

Page thirteenDesign considerations.

Pages fourteen and fifteenYorkshire Potable fittings.

Pages sixteen and seventeenGeneral high duty.

Pages eighteen and nineteen

Wedge ring and waste fittings.

Pages twenty and twe nty one

An introduction to heatingcomponents and Sidewindercylinder conversion coil.

Pages twenty two andtwenty threeMicraversion cylinder

conversion element andmanifolds.

Pages twenty four andtwenty five

Yorkshire accessories.

Page twenty sixAn introduction to Yorkshirevalves and gate valves.

Page twenty sevenStopvalves.

Pages twenty eight andtwenty nineAquadapt and plugcocks.

Pages thirty and thirty oneCustomer service.

8/12/2019 953009 T Yorkshire

4/32

The Yorkshire Potable integral solder ringfitting is precision-made and uses theprinciple of capillary attraction to allow

solder to fill the gap between the fitting socket

and the tube.

The principle of the Yorkshire Potableintegral solder ring fittingDuring manufacture, a ring of high quality,lead-free solder is positioned in each capillarysocket. The solder is released when heat is

applied to the fitting, and forms a totallyreliable joint, without the need for additionalsolder.

Proven advantages of the YorkshirePotable integral solder ring fitting

Yorkshire Potable integral solder ring (ISR)fittings contain a precise, measured amount ofsolder, so there is no need to end feed to makea perfect joint. For the installer, it removes theproblems of expensive solder waste and the

need to estimate the quantity of solderrequired to make a secure, reliable joint. Onceheated, the appearance of the solder aroundthe mouth of the socket is absolute assurance

that the joint has been correctly made.

Compact dimensionsYorkshire Potable integral solder ring fittingsare light and neat, making handling andinstallation easy. The compact dimensions ofthe fittings make best use of limited space inducts and other restricted areas. In addition,the fittings smooth lines minimise flowrestrictions and are unobtrusive on exposedpipelines.

Jointing when access is restrictedProviding that cleaning and fluxing is properlycarried out, Yorkshire Potable integral solderring fittings, with their slim, compactdimensions, can often be installed in locationsinaccessible to other types of fittings.

SpecificationThe most influentialarchitects and mechanicalservices engineers in thecountry specify Yorkshirewith total confidence when aproject requires capillaryfittings.

Prestigious fittingsYorkshire fittings have beenused on some of the mostinnovative projects of thelast few years.

Yorkshi re today

P A G E F O U R

8/12/2019 953009 T Yorkshire

5/32

A choi ce of mater i als

P A G E F I V E

The benefi ts of copper

Yorkshire Potable integral solder ringfittings are manufactured from threedifferent types of material copper,

gunmetal or a Dezincification resistant brass

(DZR).

For areas prone to dezincificationDezincification is a complex corrosion processthat can lead to the premature failure offittings made of duplex brass. YorkshirePotable fittings are manufactured fromcopper, gunmetal or DZR alloy and are all fullyresistant to dezincification.

Special finishesAs Yorkshire Potable fittings may be used insituations where they are on show - forinstance, in bathrooms where bothfunctionality and maximum aesthetic appealare required they are available in a chromeplate finish. This can either be to acommercial chrome plate finish or, availableto order in polished quality chrome plate.

Internationally recognisedmarkingAll Yorkshire Potable fittingsmanufactured from DZRalloy carry the distinctivemark.

GunmetalSome Yorkshire Potablefittings and valves aremanufactured from gunmetaland can be identified by theGM mark on the body.

For plumbing and heating applicationscopper tubes and fittings offer substantialbenefits over other pipeline materials.

The earliest recorded use of copper forconveying water is a conduit at Abusir in Egypt.Dated to 2750 BC, it is almost 4,750 years oldand is still in a remarkable state of preservation.

Over four thousand years later, at thebeginning of the 20th century, copper was once

again being used for carrying water in Europeand America in public buildings, hospitals andsimilar institutions. Its relatively high cost atthe time was outweighed by its provencorrosion resistance, which resulted in longservice and negligible maintenance costs.

Today, copper and copper alloys are recognisedas the only tried and tested plumbing materialson the grounds of corrosion resistance alone.Properly installed copper and copper alloysystems can be expected to outlast many ofthe buildings in which they are installed.

In fact, once a copper and copper alloy systemis installed it will require no regular maintenanceand is extremely resilient, giving excellent

protection against contaminants that threaten thedomestic water supply. Nothing can get throughthe walls no fluids, no germs and no oxygen.Copper does not absorb organic substancesand cannot be softened by them in service. Thismeans that in situations where the use of otherpipeline materials is restricted under UnitedKingdom Water Byelaws, for example in groundsubject to spillage of hydrocarbons, such asoil, petrol or creosote, copper and its alloyscan be used with complete confidence. Andbecause they are non-permeable, will take anypaint finish you wish to apply as well as being

totally unaffected by the suns ultra violet rays.Copper and copper alloys are fit-and-forgetplumbing materials with a proven track recordof long and trouble-free service, giving peaceof mind to specifiers and installers alike.

A proven track recordOne of the earliest copperplumbing systems installedin this country can be foundin the Bank of England in

Threadneedle Street,

London.

8/12/2019 953009 T Yorkshire

6/32

Compati ble tube mater i als

P A G E S I X

Yorkshire Potable integral solder ringcapillary fittings are suitable for jointingcopper tube to the new European

standard EN 1057.

Because this new standard is a combination ofthe existing European copper tube standards,most currently available products willcontinue to be obtainable. There are, however,a number of changes, most importantly totube sizes and material temper references.

In drawing up the standard, the committeeresponsible took the opportunity to rationalisetube sizes. As a result, EN 1057 stipulatesEuropean recommended dimensions andother existing European, but non-recommended, dimensions.

Under EN 1057, Table W and Table Y softcondition copper tube has the designatedmaterial temper reference R220. Table X and

Table Y half-hard tube becomes R250.

EN 1057 R220 Soft coiled tubes

The introduction of EN 1057will affect the materialtemper references forcopper tube and the way

tube is specified.

Material tempersTable W and Table Y softcopper tube becomes R220,

Table Y and Table X half-hard tube becomes R250.

OrderingWhen ordering half-hardcopper tube with an outsidediameter of 15mm and awall thickness of 0.7mm(BS 2871 Part 1 Table X),

the following designationshould be used:

Copper tube EN 1057

R250 1 5 x 0 . 7m m

Key

BS 2871, Part 1, Table W

BS 2871, Part 1, Table X

BS 2871, Part 1, Table Y

W

X

Y

X

XX

X

6m m

8m m10mm

12mm

15mm

22mm

28mm

35mm

42mm

54mm

66.7mm

76.1mm

108mm

133mm

159mm

Outsidediameter

X

Y

YY

Y

X

X

Y

Y

Y

Y

Y

Y

Y

Y

Y

X

X

X

X

X

X

X

X

0. 6 0.7 0. 8 0.9 1. 0 1.2 1.5 2. 0 2.5

Wall thickness (mm)

Outsidediameter 1. 2

W

6m m

8m m

10mm

12mm

15mm

22mm

28mm

Y

Y

Y

Y

Y

Y

0.6 0. 7 0.8 0. 9 1. 0

Wall thickness (mm)

W

W

Y

EN 1057 R250 Half hard straight length tubes

66.7 x 2.0mm is designated as other European dimensions

8/12/2019 953009 T Yorkshire

7/32

Compati ble tube mater i als

P A G E S E V E N

Working pressures andtemperatures of tubesFor details of the maximumpermissible working

pressures and temperaturesfor all tube types refer tomanufacturers literature.

High performanceYorkshire fittings used inconjunction with coppertube to the appropriatestandard will withstandpressure never reachedunder normal serviceconditions.

VersatilityUnlike other materialscopper and copper alloytubes and fittings areavailable in standard sizesfrom 6mm to 159mm.

Proven materialsWhere pipework is exposed,the aesthetic qualities ofcopper and copper alloysspeak for themselves. Thestrength of the materialsmean that pipelines arevirtually self-supporting,

requiring only limitedclipping. Most valves andpumps can be supportedwithout the need foradditional clips or brackets.

For more information aboutcopper tube contact:

IMI Yorkshire Copper TubeLimited, East Lancashire

Road, Kirkby, Liverpool,L33 7TU

Telephone (0151) 546 2700Fax (0151) 546 5881

Copper tubeEN 1057 R250A general purpose half-hard condition coppertube for above ground services, including

potable water, hot and cold water services,central heating and sanitation.

EN 1057 R220A thick-walled copper tube available in softcondition coils or as half-hard conditionstraight lengths suitable for potable water, hotand cold water services, central heating andsanitation.

Decorative chrome plated copper tube:EN 1057 R250A half-hard copper tube with a decorative

chrome plate finish for above ground services.Chrome plated tube is particularly suited foruse in installations where finished pipework islikely to be exposed.

The new European specification for chromeplated copper tube is identical to that forEN 1057 R250.

Stainless steel tubeThe use of integral solder ring fittings withstainless steel tube is not recommended.

8/12/2019 953009 T Yorkshire

8/32P A G E E I G H T

The Yorkshi re range

In addition to standard line fittings, the

Yorkshire Potable range also includes anextensive selection of heating components;

valves and accessories for use with domestic

hot and cold water services, heating installations,sanitation services and many other liquids andgases. Specific ranges of fittings, such asgeneral high duty and wedge ring have beendeveloped for commercial and industrialapplications, such as steam and condensatepipelines and other engineering applications.

Yorkshire Potable fittingsA range of integral solder ring (ISR) capillaryfittings manufactured from copper or copperalloys for jointing copper tube in hot and coldwater services, heating systems, in sanitationservices for domestic, commercial andhospital applications and industrialapplications such as gas distribution systems.Each fitting contains a precise amount of leadfree solder for a perfect joint every time.

Yorkshire general high dutyA range of capillary fittings in gunmetal (LG4)or aluminium brass with an integral silver

brazing alloy specifically designed for heavyduty applications where the capabilities ofsoft solders are exceeded, such as hightemperature steam and condensate pipelines.General high duty fittings are also suitable foruse in medical gas lines, vacuum, refrigerationand cryogenic applications.

Yorkshire wedge ring fittingsPurpose designed large size wedge ringfittings in 76.1mm and 108mm sizes with leadfree tin/silver solder. Fittings with reduced

ends smaller than 76.1mm contain tin/coppersolder. Wedge ring fittings are manufacturedfrom copper, gunmetal or other dezincificationresistant alloy and are designed for jointingcopper tube primarily in water services,heating and sanitary applications.

Yorkshire waste fittingsA range of copper, brass and gunmetal integralsolder ring fittings in sizes and configurationscompatible with standard domestic and

commercial waste systems.

AccessoriesA comprehensive range of Yorkshireaccessories is available including re-roundingtools, tube straightners and benders, assemblytools, cleaning pads, heat resistant mats,fluxes and valve keys.

All the fittings youll everneed

The IMI Yorkshire Fittingscatalogue provides a

comprehensive list ofavailable products.

YP logo

Every Yorkshire Potablefitting carries this distinctivelogo as proof that is agenuine Yorkshire Potablefitting and that the solder islead free.

8/12/2019 953009 T Yorkshire

9/32

Pipe clips and bracketsA comprehensive selection of pipe clips andbrackets is available including saddle bands,wall brackets, hospital brackets and pipe joist

clips.

Heating componentsTo complement Yorkshire Potable ISR fittingsinstalled in heating installations, acomprehensive selection of components foruse in vented or unvented heating systems isalso available.

Manifolds a range of linear and side entrymanifolds for use in minibore central heatingsystems, enabling the system to be tailored tosuit the layouts of domestic or commercial

vented or unvented heating systems.Micraversion element a tubular copperheat exchanger designed for the easy andeconomic conversion of copper direct hotwater cylinders to indirect use. Themicraversion is designed to fit into theimmersion heater boss of direct cylinders.

Sidewinder a copper conversion coildesigned to convert copper cylinders fromdirect to indirect use. The copper sidewinderis fitted in such a way that there is little or nodisturbance to the existing copper cylinder or,in many cases, to the existing electricalimmersion heater.

Valves and controlsThe Yorkshire Potable range is complementedby an extensive selection of valves andaccessories for both domestic and industrial

applications.Gate valves a range of brass and gunmetalfull bore valves designed to control flow in hotand cold water services, central heatingsystems, oil lines, steam installations,compressed air lines and certain chemicalsupply lines, particularly where a low pressuredrop is required.

Stopvalves a range of Stopvalves withgunmetal bodies and brass, DZR or gunmetalheadworks for controlling flow in both hotand cold water services.

Plugcocks a range of plugcocksmanufactured from brass and designed for useon low pressure gas and water applications.

Yorkshire plugcocks are available with oblongbores for gas services or full round bores forwater services. Certain variants are availablewith a drop headwork, for use where space isrestricted, or with union outlet connections.

Aquadapt a unique stopvalve water meteradaptor that eliminates the drawbacksassociated with installing an internal meter.

The Aquadapt simply replaces the existingstopvalve headwork allowing a water meter tobe fitted.

Manifolds

Micraversion

Sidewinder

Gate valves

Plugcocks

Aquadapt

The Yorkshi re range

P A G E N I N E

8/12/2019 953009 T Yorkshire

10/32

In line with our commitment to manufacturingto the highest quality levels, Yorkshire Potablefittings and valves comply with the current

British, European and International standards.

Future developmentsWe recognise that the current programme ofstandard harmonisation may affect thestandards relevant to the Yorkshire Potablerange. Indeed BS 864 Part 2, the standard forcapillary and compression fittings of copperand copper alloy will be replaced by EN 1254Parts 1 to 5 in the near future. IMI YorkshireFittings is actively involved in the drafting ofthis and other new European standards andhas members on the relevant Europeanstandards committees.

Whatever the developments, we guarantee thatour products will always meet the latest andhighest standards.

Yorkshire Potable integral solder ringfittingsBS 864: Part 2Specification for capillary andcompression fittings of copper and copperalloy for copper tubes

pr EN 1254 Part 1 Specification for copperand copper alloy fittings with capillary ends forsoldering and brazing for use with copper tubes

BS2779/ISO 228/1Specification for pipethreads and fittings where pressure tight jointsare not made on the threads (metricdimensions)

BS 1010 Part 2Draw off taps, above groundStopvalves and union ends

BS 10Specification for flanges and bolting forpipes, valves, and fittings

BS 4504: section 3.3Specification for copperalloy and composite flanges

BS EN 29453 (previously BS 219)Specification for soft solders

Yorkshire wedge ring fittingsBS 10Specification for flanges and bolting forpipes, valves, and fittings

BS 4504: section 3.3Specification for copperalloy and composite flanges

BS EN 29453 (previously BS 219)Specification for soft solders

Yorkshire general high duty fittingsBS 1845 Specification for filler metals for brazing

Yorkshire waste fittings

BS EN 29453 (previously BS 219)Specification for soft solders

ManifoldsCapillary ends conform to BS 864 Part 2 allother ends conform to IMI Yorkshire Fittingsown exacting internal quality standards.

Micraversion heating elementMicraversion is manufactured to IMI YorkshireFittings own exacting internal quality standards.

Sidewinder conversion coilBS2779/ISO 228/1Specification for pipethreads and fittings where pressure tight jointsare not made on the threads (metric dimensions)

Tube standard EN 1057 R250

Yorkshire gate valvesBS 5154Specification for copper alloy globe,globe stop and check, check and gate valves

Ends in accordance with BS 864 Part 2(pr EN 1254 Part 1).

Quality systemsIMI Yorkshire Fittings Limitedis a British StandardsInstitution registeredcompany.

Evaluated by the WRcThe Yorkshire Potable rangehas been tested by the WRcand is audited periodically.

International StandardsOrganisationInternational standards areconformed to whereappropriate.

Cur rent and future standards

P A G E T E N

8/12/2019 953009 T Yorkshire

11/32

Yorkshire stopvalvesBS 1010 Part 2Draw off taps, above groundStopvalves and union ends

BS 1010 stopvalve ends are in accordance withBS 864 Part 2 (pr EN 1254 Part 1).

BS 2879Specification for draining taps(screw down pattern)

BS 5433Specification for undergroundStopvalves for water services

Yorkshire plugcocksBS 1552Specification for manual shut offvalves for use with first and second familygases

Ends are in accordance with BS 864 Part 2(pr EN 1254 Part 1).

AquadaptAquadapt conforms to IMI YorkshireFittingsown exacting internal quality standards.

Material specificationsYorkshire Potable fittings and valves are

manufactured to the following specificationsfor materials used.

BS 1400Specification for copper alloy ingotsand copper alloy high conductivity coppercastings

pr EN 1982Specification for copper andcopper alloys, ingots and castings

BS 2872Specification for copper and copperalloy forging stock and forgings

pr EN 12165Specification for copper andcopper alloys, wrought and unwrought forgingstocks

BS 2874Specification for copper and copperalloy rods and sections other than forgingstock ( including testing for dezincificationresistance) of alloys CZ121 (CW614N), CZ122(CW617N), CZ132 (CW602N)

pr EN 12162Specification for profiles andrectangular bar for general purposes

pr EN 12163Specification for copper and

copper alloy rod for general purposespr EN 12164Specification for copper andcopper alloy rod for free machining purposes

pr EN 12168Specification for hollow rod forfree machining purposes

Quality systemsAll Yorkshire products are manufacturedunder quality systems in accordance withEN 29002/ISO 9002.

Where appropriate Yorkshire products carry

the kitemark symbol of the British StandardsInstitution.

UKWFBS listedWhere appropriate Yorkshire products areUnited Kingdom Water Fittings ByelawsScheme approved, further evidence that ourproducts meet the most exacting industrystandards. The WRc regularly re-audits

Yorkshire Potable fittings before continuedUKWFBS listing is given.

The keyword is quality

Continuous product development is at theheart of IMI Yorkshire Fittings companypolicy, both in the design and development ofnew products and the refining of existing ones.Our manufacturing processes are also subjectto constant monitoring and evaluation toensure that each fitting is of the very highestquality.

25 year guaranteeOur policy of continuously and rigorouslytesting Yorkshire fittings means we areconfident that they will give years of troublefree service. To demonstrate the totalconfidence we have in our products and ourcommitment to customer service, all Yorkshirefittings are guaranteed against manufacturingdefects for 25 years.

Commitment to customersatisfactionEvery Yorkshire Potablefitting is guaranteed for 25years against manufacturingdefects.

Contact with the tradeIMI Yorkshire Fittings is anindustrial associate of theInstitute of Plumbing, aninfluential body in theindustry.

Links with Merchant groupsIndustry trends andcustomer opinions can bemonitored through the BMF.

Links with end usersAs members of the NationalAssociation of Plumbing,Heating and MechanicalServices Contractors we canmonitor the views ofinstallers.

Regional patternsAssociation with regionalbodies like the SNIPEF alsohelps to create a broaderpicture of the industry.

Guaranteed for 25 years

P A G E E L E V E N

8/12/2019 953009 T Yorkshire

12/32

The following instructions for jointing

Yorkshire Potable integral solder ringfittings illustrate just how easy it is to use

Yorkshire products. Installation details for

Yorkshire general high duty and Yorkshirewedge ring fittings can be found on pagessixteen and seventeen respectively.

The fittings use the principle of capillaryattraction to allow solder to fill the gapbetween fitting and tube to form a completelyreliable joint.

PreliminariesSelect the correct size of tube and fittings forthe job. Ensure the ends of the tube are cutsquare and remove any burr from the inside or

outside. Re-round the ends with a re-roundingtool if using fully annealed tube i.e.EN 1057 R220/R250.

Installation tips1.The reliability of soldered joints is greatlyinfluenced by the type of flux used. Yorkshireflux and Traditional Craftsmans flux areespecially formulated for jointing copper tubeswith Yorkshire and Endex fittings. However,regardless of which flux is chosen, the tube andfitting should always be cleaned before fluxing.

All fluxes are, to some extent, corrosive butspecial care should be taken with so-called selfcleaning fluxes.

It is important that the system is flushedimmediately after soldering, especially if thesystem is to be left empty for any length of time.External flux residues should also be removedto prevent unsightly stains or in extreme casescorrosion of pipework.

2. If one or more ends of a YP fitting are toremain unmade a short length of correctlysized, uncleaned tube should be inserted intothe ends to be left unjointed. Keep this section

cool by wrapping a wet rag around it whileheating the remaining ends.

3. Remaking joints: J oints made with YorkshirePotable fittings are difficult to disconnect dueto the intermetallic bonding between thesolder and the copper of the fitting and tubeand therefore the re-use of Yorkshire Potablefittings is not generally recommended.

However, in some situations, joints can beremade by fluxing the tinned portion of thetube and reinserting this into the fitting. Thenheat the joint and hand-feed lead-free solder. Ifa new tube is to be used, clean and flux thetube before assembly. End feed lead free solderat the mouth of the socket after reheating.

4. Most male connectors eg. YP3, YP8, andYP13 have taper BSP threads and may requirethe use of jointing materials, it is advisable thatsoldering operations are completed beforesuch materials are applied to the threads.

For domestic water services, the use of aUKWFBS (WRc) listed jointing compoundcomplying with BS 6956 Part 5 or PTFE tapecomplying with BS 6974 and satisfying therequirements of BS 6920 Part 1 isrecommended. When installing fittings withparallel connector threads, a good quality

jointing washer should be used.

5. Union fittings have metal-to-metal conejoints to BS 1010. Avoid damaging the matingfaces and, if required, use a UKWFBS (WRc)listed jointing compound complying withBS 6956 Part 5 or apply a sufficient amount ofPTFE tape complying with BS 6974 andsatisfying the requirements of BS 6920 Part 1.

Tighten the joint with a spanner.

6. If it is necessary to break into existing pipesfor repairs or to fit new branches, slipcouplings or tees which have no tube stopsmake the job easier and avoid disturbing the

rest of the system.

Using Yorkshire Potable fittings withchrome plated tubeAs solder will not bond to chrome plate theplating needs to be removed before a joint ismade.

1. Remove chrome plating from the tube forthe distance the tube goes into the fitting usingcoarse emery cloth, followed by finesandpaper or a Yorkshire cleaning pad.

2. After applying flux to the surface of the tube

and fitting heat the joint in the usual manner.3. Discolouration of the chromium caused byheating the joint can be removed by washingthe fitting with soap and warm waterimmediately after the joint has cooled.

Assembly:

Step 1Clean the inside of the fittingsocket and the outside ofthe tube with a Yorkshirecleaning pad, fine sandpaper,or steel wool.

Step 2Using a suitable brush,apply adequate but notexcessive Yorkshire flux toboth the outside surface ofthe tube and the inside

surface of the fitting socket.

Step 3Insert the tube into the

fitting until it reaches thetube stop, then wipe off anyexcess flux. Heat theassembled joint until acomplete ring of solderappears at the mouth of thefitting.

Step 4Allow the joint to coolwithout disturbance. Cleanthe joint generally.

Easy i nstallati on

P A G E T W E L V E

8/12/2019 953009 T Yorkshire

13/32

Amajor consideration when designingplumbing and heating systems is thermalmovement. Pipework systems expand

and contract with changes in temperature and

will be subjected to stress if their movement isrestricted. So, particularly with central heatingsystems, always account for the effects ofthermal movement when designing orinstalling a system.

Copper has a coefficient in linear expansion of17 x 10-6/ C. As an example, a 10 metre lengthof copper pipe carrying domestic hot water at60C will expand by almost 7mm (more than 14")when heated from an ambient temperature of20 C.

In addition, assuming that temperature cycling

of the system is 20C, there will be acontinuous cycle of expansion and contractionof 3.4mm taking place.

The table below gives the expansion in mm ofcopper tube for various rises in temperature.

Clearly the stresses imposed can beconsiderable if no allowance is made forthermal movement. Stress concentrationsbetween fixed points typically found atradiators, valves and other fittings should beavoided wherever possible.

Anchoring the branch of a tee, or connecting a

radiator by means of too short a spur, willprevent normal thermal movement and maylead to failure. As such, expansion loops orbellows devices should be incorporated atappropriate points within the system. Whencontinual thermal cycling is encountered, ahorse shoe link, or loop formed from onelength of the tube, is recommended.

Wherever pipework is to be installed underscreed or plaster, it is very important to makeadequate allowance for thermal movement.

The preferred practice is to lay tubing in ductssurrounded by loose, non-rigid material suchas vermiculite or glass wool.

A useful reference document to consult forfurther information is BS 6700 water servicesin buildings.

Adapting imperial to metric withYorkshireSometimes a Yorkshire Potable fitting mayneed to be connected to an older installationwhere imperial sized tube has been used. Thispresents no problem - simply use a YorkshirePotable imperial to metric adaptor coupling.One end of the adaptor fits onto imperial pipe

and the other on to metric pipe. YorkshirePotable imperial to metric adaptors areavailable in several combinations.

Threaded connectorsYorkshire Potable male threaded connectorsfor jointing pipework to boilers, pumps orbackplate elbows have taper male BSPthreads. A small quantity of inert jointingcompound or PTFE tape should be applied tothe male thread before installing the fittings.

Female connectorsYorkshire Potable female threaded connectorshave internal threads to BS 2779 and should beused for general connections from malethreaded fittings to copper pipework.

Basic techniques for

expansion stress relief

Horseshoe expansion li nk

Crossover tee arrangement

Expansion loopSuitable for 6, 8 and 10mmtubes only

Tee and cross

specification

UK specification

First quote the ends on therun (larger end first) and thenthe branches.

European specificationQuote the larger end first, then

the branch, followed by theremaining end and finally forcrosses, the remaining branch.

Desi gn consi derati ons

P A G E T H I R T E E N

0.5 0.7 0.9 1.0 1.2 1.4 1.5 1.7 2.0 4.31.0 1.4 1.7 2.0 2.4 2.7 3.0 3.4 4.0 8.51.5 2.0 2.6 3.1 3.6 4.1 4.6 5.1 6.1 132.0 2.7 3.4 4.1 4.8 5.4 6.1 6.8 8.2 172.6 3.4 4.3 5.1 6.0 6.8 7.7 8.5 10.2 213.1 4.1 5.1 6.1 7.1 8.2 9.2 10.2 12.2 263.6 4.8 6.0 7.1 8.3 9.5 10.7 11.9 14.3 304.1 5.4 6.8 8.2 9.5 10.9 12.2 13.6 16.3 344.6 6.1 7.7 9.2 10.7 12.2 13.8 15.3 18.4 385.1 6.8 8.5 10.2 11.9 13.6 15.3 17.0 20.4 43

Tube length (m)3 4 5 6 7 8 9 10 12 25

102030405060708090100

Temperaturechange C

8/12/2019 953009 T Yorkshire

14/32

Comprehensive RangeThe Yorkshire range offersmore than a 100 patterns.

Yorkshi re Potable fi tt i ngs

P A G E F O U R T E E N

The integral solder ring in the YorkshirePotable (YP) range contains lead-freesolder. The YP mark is your assurance

that these fittings fully comply with the current

UK Water Byelaws.Most Yorkshire Potable integral solder ringfittings are manufactured from copper or,where this is not possible from suitable copperalloys. In this case the quality is noted by theGM mark on castings and mark on fittingsmade from Dezincification Resistant alloys.

Where to use Yorkshire Potable fittingsYorkshire Potable integral solder ring fittingsare suitable for use on all direct and indirect,hot and cold domestic water services, in smallbore and minibore central heating systems andin low pressure steam heating and pressurised

unvented heating systems within permittedtemperature and pressure limits. In addition,they can be used in sanitation services for alltypes of domestic, commercial and hospitalapplications.

The fittings are also suitable for commercialand industrial applications including;compressed air lines, gas distribution systemsfor natural and manufactured gases, with fueloils and kerosene and on engineering pipelineservices that convey liquids, oils, air and gasesat temperatures up to 110C.

Size rangeYorkshire Potable fittings are manufactured tofit tube sizes from 6mm to 108mm outsidediameter and are designed for jointing copper

tubes to EN 1057 .The extensive range of patterns availableenables the installer to select the right

Yorkshire Potable fitting whatever thesituation.

8/12/2019 953009 T Yorkshire

15/32

Working pressures and temperaturesBS 864: Part 2 specifies hydraulic workingpressures and temperatures for fittings

assembled with tubes to EN 1057.

Solder content

Yorkshire Potable integral solder ring fittingscontain tin/copper lead-free solder, alloynumber 23 with a melting range of 227 235C.

Jointing temperatures can be easily reachedusing a conventional heat source such as apropane or butane torch.

Standards and approvalsYorkshire Potable fittings in sizes 6mm to67mm comply with BS 864 Part 2.

External BSP (taper) threads are machined toBS 864 : Part 2. External and internal BSPparallel threads conform with BS 2779 andISO R228/1.

Imperial flanges have bolt hole sizes andflange outside diameters to BS 10 Table D.

Metric flanges have bolt hole sizes and flangeoutside diameters to BS 4504 section 3.3.

The solder used in Yorkshire Potable fittings isBS EN 29453 alloy number 23 for sizes 6mm to67mm.

Yorkshire Potable fittings are kitemarked,UKWFBS listed and are, in addition, approvedby all UK Municipal Authorities, British GasPlc. and many other approval organisationsworldwide.

Helpful specification clausesTo ensure the right product for the job thecorrect terminology to use in yourspecification is All integral solder ring fittingsshall conform to BS 864 Part 2 (pr EN 1254Part 1) and be drawn from the YorkshirePotable range as supplied by IMI YorkshireFittings Limited.

Fibre washersWhere tap connectors orother fittings are assembledwith fibre washers, servicetemperatures must notexceed 100C.

Gas services

Fibre washers are notsuitable for use on gasservice pipelines.

Yorkshi re Potable fi tt i ngs

P A G E F I F T E E N

Service temperature30C 65C 110C

Size

6 54mm67mm

16 bar 10 bar 6 bar10 bar 6 bar 4 bar

8/12/2019 953009 T Yorkshire

16/32

Yorkshire general high duty fittings arespecially designed for use with copperand copper alloy tubes which need to

operate at higher temperatures or pressures

than are permissible with soft solder joints.The range is made from gunmetal (LG4 and LG2)or aluminium brass.

The integral solder ring is of a cadmium-freesilver brazing alloy, complying with thecompositional requirements of BS 1845 alloyAg14.

The jointing temperature for general high dutyfittings is approximately 700C and is lowerthan that required to make a brass brazed

joint, thus the risk of overheating the tube andfitting is reduced.

Where to use general high duty fittingsYorkshire general high duty fittings should beused for systems in which service conditionsexceed the capabilities of soft solders, forexample, high temperature heating servicessuch as, steam and condensate pipelines. Thecharacteristics of the joint make the fittingsuitable for hydraulic services where vibrationand stresses are imposed. The range is alsosuitable for specialised services where hightemperatures and pressures exist singly or in

combination.Other uses include; refrigeration, cryogenic,vacuum, air-conditioning services, vehiclebraking systems and gas lines medical,nitrogen and oxygen.

Size rangeGeneral high duty fittings are manufactured tofit tube sizes from 6mm to 54mm outsidediameter and are designed for jointing copperand copper alloy tubes to EN 1057.

Installation preliminaries1. Select the correct size of fitting and tube.

2. Ensure that the tube ends are cut square

and remove any burrs. Do not use a rotarytube cutter as this tends to reduce thediameter of the tube ends.

3. Clean the outside of the tube and inside andend face of each fitting socket with finesandpaper, Yorkshire cleaning pad or alumina-based paper or cloth.

4. General high duty fittings require the use ofthe correct flux. Flux is supplied as either readymixed paste or powder. If powder flux is usedsufficient should be mixed with clean water andblended into a creamy paste. Mix the flux as

required and keep the powder in the containerdry - replace the lid immediately after use.

Installation tips1.The source of heat should be sufficientlylarge to heat the tube and fitting gently to avisible red heat in poor daylight approximately 700C.

2. When heating general high duty joints usean oxy/gas, oxy/acetylene or oxy/propanetorch of the appropriate size.

3. A large, soft, neutral or slightly reducing

flame should be used to avoid excessive localheating, and the torch should be kept movingthroughout the making of the joint.

4. Recommended fluxs include:

a. Degussa H ready mixed paste.b. Easy-Flo powder flux.

Satisfactory joints can however be made withother suitable silver brazing alloy fluxes.

5. Union type fittings such as 11GHD, 65GHDand 69GHD have round nose-to-seat joints.

Assembly

Step 1Clean the outside of the tubeand the inside of the fittingwith fine sandpaper or a

Yorkshire cleaning pad.

Step 2With a small brush, applythe flux paste to the insideof the fitting socket and theoutside of the tube, to alength slightly greater thanthe socket depth.Insert the tube into thefitting until it reaches thestop, preferably twisting thetube in the fitting to spreadthe flux. Ensure that thetubes are correctly lined upand adequately supported,

otherwise distortion orcracking of the fittings mayoccur when at brazingtemperature.

Yorkshi re general hi gh duty

P A G E S I X T E E N

8/12/2019 953009 T Yorkshire

17/32

To avoid leaks, care should be taken to protectthe jointing faces from damage. Any fluxresidues and scale must be removed after

heating. With joints of this type, it is essentialto use a UKWFBS (WRc) listed jointingcompound complying with BS 6956 Part 5 orsufficient PTFE tape complying with BS 6974and satisfying the requirements of BS 6920 Part 1to obtain completely satisfactory results.

6. Silver brazing alloy fluxes must be usedwith care and always in a well ventilated area.

The safety precautions detailed on the fluxcontainers must be strictly followed. Furtherinformation is available on request.

7.J oints made with Yorkshire general high

duty fittings should be regarded as permanent.If it is anticipated that the system will have tobe broken into, fittings such as the 11GHDunion coupling should be installed at appropriatepoints. The use of composite flanges offers avery satisfactory alternative, particularly in thelarger sizes (22mm 54mm). Yorcalloy flangesin sizes 22mm to 54mm inclusive with BS 10table D outers are available for the generalhigh duty range. For further details, pleasecontact your local sales office.

8.The use of disconnecting fittings also allowsections of the installation to be completed onthe workbench, thus avoiding the need tomake joints in difficult places. Thisprefabrication technique is particularlyrecommended in the case of the larger sizes(22mm 54mm).

9. Imperial to metric adaptors: Where thelayout permits, the most economical way ofadapting from imperial to metric is to use the

9GHD.

Working pressures and temperaturesFor non marine applications, all sizes aredesigned to operate with tubes to EN 1057outside diameters.

Maximum working pressures forapplications not subject to classificationsociety requirements

Standards and approvalsYorkshire general high duty fittings aredesigned to IMI Yorkshire Fittings ownexacting standards with designs based onLloyds formula.

Helpful specification clausesTo ensure the right product for the job thecorrect terminology to use in your specificationis All general high duty fittings shall be drawnfrom the Yorkshire general high duty range assupplied by IMI Yorkshire Fittings Limited.

Step 3Heat the appropriate socketand tube to approximately700C (red heat in poordaylight). Continue heatinguntil a complete ring ofsolder appears round thesocket month. This is proofof a sound joint. Continue toheat generally for a few

seconds. Repeat thismethod for each joint inturn. If for any reason thecomplete ring of solder doesnot appear, apply additionalflux to the mouth of thesocket and end feed the jointwith J ohnson MatheysSilver-Flo 55 or equivalentsilver brazing alloy to thecompositional requirementsof BS 1845 Ag 14.

Step 4Allow joints to cool withoutdisturbance. Do not quenchin water. Residual flux mustbe removed when cold withwarm water, a steel wirebrush or abrasive. Ifrequired, oxide films can beremoved with an abrasive orby chemical means.

Yorkshi re general hi gh duty

P A G E SE V E N T E E N

Service temperature150C 175C 200C

Size

6m m8m m12mm15 54mm

242 bar 151 bar 61 bar202 bar 128 bar 51 bar158 bar 99 bar 40 bar69 bar 43 bar 17 bar

8/12/2019 953009 T Yorkshire

18/32

These specially designed wedge ringfittings contain an integral soft solder ringfor the trouble-free jointing of copper

tubes to EN 1057. The range is manufactured

from gunmetal or copper.

All fittings incorporate lead-free solder and allends contain tin/silver solder (Alloy number 29Sn97Ag3), except reduced ends with diameterssmaller than 76.1mm which contain tin/coppersolder (Alloy number 23 Sn99Cu1).

Because of the dimensional tolerancevariations of 76.1 and 108mm tubes, it is notpossible to obtain the correct capillaryconditions for soft soldering with parallelsocket fittings.

To overcome this, Yorkshire wedge ring fittingsare made with tapered sockets. The annularspace between the socket wall and the paralleltube is occupied by a pre-tinned taperedwedge ring, pushed home by the specialassembly jig. The wedge ring enables thecorrect soldering tolerances to be achieved.

Flange connectors are available in 76.1mm and108mm sizes with flange bolt hole sizes andflange outside diameters to BS 4504 section 3.3(metric) or BS 10 table D (imperial).

Where to use Yorkshire wedge ringfittingsWedge ring fittings are ideal for jointing copperpipelines, primarily for potable water services,water heating, sanitation and manyengineering applications.

Size rangeThe Yorkshire wedge ring range comprisescouplings, reducers, connectors, bends, teesand stop ends and flanges in both 76.1 mm and108mm sizes.

Installation preliminaries1. Select the correct size of fitting and tube.

2. Ensure that the tube ends are cut square

and remove any burrs.3. Clean the outside of the tube with finesandpaper or a Yorkshire cleaning pad.

4. Flux the tube end, the socket of the fittingand both sides of the tapered ring with

Yorkshire flux.

Assembly1. Slip the wedge ring onto the tube, with thethinner edge towards the fitting, and push thetube into the fitting, press the ring as far aspossible into the mouth of the fitting by hand.

2.Take the assembly tool, unscrew the nuts,and open the tool.

3. Locate the assembly tool on the fitting andtube, ensuring that captive part engages theshoulder of the fitting. See that the sliding partof the tool is free to engage on the exposedface of the wedge ring. Then make sure thatboth halves of the assembly tool arecompletely closed.

4. Screw both nuts hand tight then, using anopen ended spanner or good quality adjustablespanner, tighten the nuts alternately, exerting an

even pressure on the wedge ring until it is feltthat the ring has been pressed home. DO NOTUSE EXCESSIVE FORCE. The tapered wedgering, when pressed home, may be a little aboveor below the level of the mouth of the fitting.

5. Unscrew the nuts, remove the assembly tooland repeat stages 1 to 5 for the remainingend(s) of the fitting.

6. Heat the joint. Because of the large mass ofmetal in the tube and the fitting, it is necessaryto use a blowlamp giving a flame of generous

Using the assembly

tool

Step 1Slip the wedge ring onto thetube, with the thinner edgetowards the fitting, and pushthe tube into the fitting up tothe tube stop. By hand,press the ring as far aspossible into the mouth ofthe fitting.

Step 2Take the assembly tool,

unscrew the nuts, and openthe tool. Locate theassembly tool on the fittingand tube, ensuring that thecaptive part engages theshoulder of the fitting. Seethat the sliding part of thetool is free to engage theexposed face of the wedgering. Then make sure thatboth halves of the tool arecompletely closed.

Step 3Screw both nuts hand tightthen, using a spanner,tighten the nuts alternately,exerting an even pressureon the wedge ring until it is

felt that the ring has beenpressed home. Unscrew thenuts, remove the assemblytool and repeat theprocedure for the remainingends of the fitting.

Yorkshi re wedge r i ng fi tti ngs

P A G E E I G H T E E N

8/12/2019 953009 T Yorkshire

19/32

Yorkshi re wedge r i ng fi tti ngs

P A G E N I N E T E E N

Yorkshi re waste fi tt i ngs

proportions or, alternatively, an air/gas blowtorch.

Heat each joint separately. Do not concentratethe flame at one point. Heat around the fittingsocket and the tube where it enters the fitting.Continue heating until complete rings of solderappear between the tube and the tapered ring,and between the tapered ring and the fitting.

The appearance of these two rings of solder isessential and, when visible, they are proof of asound joint.

When the tolerance between tube and fitting issuch that the outer end of the tapered ring isbelow the mouth of the fitting, the two solderrings may join together.

7. Leave the joint(s) undisturbed to cool.

8. Remove external flux residues and, whereappropriate, flush out the pipework.

Working pressures and temperatures

Helpful specification clausesTo ensure the right product for the job thecorrect terminology to use in yourspecification is All 76.1mm and 108mmfittings shall be drawn from the Yorkshirewedge ring range as supplied by IMI YorkshireFittings Limited.

Arange of copper and copper alloy fittingsin sizes suitable for domestic andcommercial waste systems.

Where to use Yorkshire waste fittingsWaste fittings are designed for connecting tobasins, baths and sinks and other sanitaryappliances in domestic and commercialproperties. The range has been specificallydeveloped to enable the installation of

effective waste water systems. In addition toline fittings, the range includes shallow anddeep seal traps as well as a selection of fittingswith rodding eyes to enable inspection andcleaning of the pipework. Bends, tees andcrosses are designed with built in fall as

required by good plumbing practice.

Size rangeThe Yorkshire waste range is available instandard sizes from 28mm to 54mm.

Standards and approvalsYorkshire waste fittings are manufactured toIMI Yorkshire Fittings own exacting internalquality standards.

Helpful specification clausesTo ensure the right product for the job thecorrect terminology to use in yourspecification is All waste fittings shall bedrawn from the Yorkshire waste fittings rangeas supplied by IMI Yorkshire Fittings Limited.

Waste system maintenanceSome patterns are availablewith rodding eyes whichallow access to pipework inorder to remove blockages.

Step 4Assembled joint ready forheating.

Service temperature30C 65C 110C

Size

76.1mm108mm

10 bar 5 bar 1 bar10 bar 5 bar 1 bar

8/12/2019 953009 T Yorkshire

20/32

Atubular copper coil heat exchanger designedfor the simple and economic conversion ofdirect hot water cylinders to indirect use

to enable the converted unit to operate as apurpose made unit. All materials in the Sidewinderconversion coil are resistant to dezincification.

Where to use the SidewinderThe Sidewinder conversion coil is suitable foruse in copper cylinders with a capacity of up to180 litres. Cylinders should be from 380mm (15")diameter upwards to allow the coil to be insertedfrom the side. Where the capacity of the cylinderexceeds 180 litres, two or more coils should beinstalled, depending on the performance required.

TheSidewinder conversion coil will operate onboth gravity and pumped primaries wherevercombined central heating and domestic hotwater services are required.

The conversion coil can be used withsmallbore,minibore, pressurised or non-pressurised centralheating systems. The coil is particularly effectivewhere natural (gravity) circulation is required.Sidewinder conversion coils can be used forindustrial applications where low outputheatexchangers are required such as vats or tanks.

ConnectionsFlow and return connections to theSidewinder should be made with the following34" capillary or compression connectors:

Yorkshire Potable YP72 plus a YP64 or YP68Kuterlite 612 22 x 34" or 28 x 34"

When installation is complete, refill thecylinder and recharge the primary circuit inthe normal way.

InstallationIf the Sidewinder conversion coil is to be fittedto a pre-insulated cylinder, the installer shouldfirst check that there will be sufficientclearance around the holes to enable theSidewinder conversion coil to be fitted without

damaging either the coil or the cylinder.After draining the cylinder, any existing flowand return pipes should be disconnected andthe cylinder connections sealed with cap nutsor plugs as appropriate, e.g. Yorkshire 470 DZRor 450 DZR.

Decide where best to position the Sidewinderconversion coil within the cylinder. The coilshould be installed near the bottom of thecylinder and should not come into contactwith the electric immersion heater element. Ifnecessary remove the immersion heater.

Draw two circles, A and B, using the templateprovided, ensuring they are positioned vertically,to illustrate the position of the coil ends on thecylinder wall and punch the centres. Aroundthe top circle A, and using the same centre,mark a second circle 70mm (234") in diameter(using the outer copper washer supplied as aguide) to ensure the correct final alignment ofthe coil when installed. Drill the hole 54mm(218") diameter.

Drill the bottom hole B 27mm (1116") diameter.

Smooth the edges of both holes before feedingin the coil. Insert one end of coil into thecylinder through hole A, having first secured afibre washer to the threaded end with jointingpaste. Slowly wind the coil into the cylinderwithout exerting undue pressure.

Installation

Step 1Using the template provided,

mark vertically the positionof the coil ends on thecylinder wall and punch thecentres. Around the topcircle A, and using the samecentre, mark a second circle70mm (234") in diameter(using the outer copperwasher as a guide) toensure correct finalalignment of the Sidewinderwhen fitting. Drill the hole54mm (218") diameter.Drill the lower hole B, 27mm

(11

16") diameter. Smooth theedges of both holes beforefeeding in the sidewinder.

Step 2Insert one end of coil into

cylinder through top hole,having first secured a fibrewasher to the threaded endwith jointing paste. Slowlywind the coil into thecylinder without forcing.

Yorkshi re heati ng components

P A G E T W E N T Y

IMI Yorkshire Fittings supplies acomprehensive range of componentsspecifically for use in heating systems.

Yorkshire heating components are designed tomake the installation of heating systems quickand economical.

The wide range of products available ensuresthat Yorkshire heating components are suitablefor nearly all types of heating installation.

A comprehensive selection of manifolds,including linear flow and side entry manifoldsare available, as well as the Micrafold whichmay be used with 8mm and 10mm heating

installations.Cylinder conversion coils, for convertingcopper cylinders from direct to indirect useare also included within the heatingcomponents range making heating systemsversatile and adaptable.

Si dewi nder conversi on coi l

8/12/2019 953009 T Yorkshire

21/32

Supporting the coil, through hole A, with thepiece of plastic tube supplied manoeuvre thebottom connection through hole B, and fitanother fibre washer and a back nut to the

bottom connection and loosely tighten.Pass one of the fibre washers and the notchedsealing plate over the plastic tube, and byrotating, guide them into the cylinder and onto the threaded end of the coil. Draw thethreaded end of the coil through hole A andstill holding the plastic tube, fit the rubberwasher, outer copper washer, a fibre washerand back nut (PTFE tape complying withBS 6974 and satisfying the requirements ofBS 6920 Part 1 should be applied to threadsprior to fitting the backnut to ensure that theconnection is water-tight). Tighten up bothupper and lower backnuts with the aid of aspanner and finally withdraw the plastic tube.Do not over tighten and do not trim the rubberwasher or allow it to come into contact withany sealant.

Standards and approvalsThe copper tube used in the manufacture ofthe Sidewinder is to EN 1057. The externalBSP threads of connectors and backnuts aremachined to BS 2779/ISO 228/1.Sidewinder is British Gas accepted.

Working temperatures and pressuresSidewinder conversion coils are suitable foruse with pumped primaries at a maximum of98C and 6 bar.

Performance dataSidewinder conversion coils will providedomestic hot water as follows:

Volume of stored water heated from 10Cto 60C per hour in a natural (gravity)circulation system utilising 28mm

diameter pipework

*Maximum hot water temperature achieved is 57C

Volume of water heated from 10C to 60Cper hour in a natural (gravity) circulationsystem utilising 22mm diameter pipework

Heat output when secondary watertemperature is 10C in a system withpumped primary circuits

Helpful specification clausesTo ensure the right product for the job thecorrect terminology to use in yourspecification is All cylinder conversion coilsshall be Sidewinders, drawn from the

Yorkshire heating components range assupplied by IMI Yorkshire Fittings Limited.

Step 3Supporting the coil with thepiece of plastic tube in holeA, manoeuvre the bottomconnection through thelower hole, and fit anotherfibre washer and a back nutand loosely tighten.

a Fibre washersb Notched sealing platec Rubber washerd Outer copper washer

Step 4Pass one of the fibrewashers and the notchedsealing plate over the plastictube, and by rotating, guidethem into the cylinder andon to the threadedconnector. Draw thethreaded end of the coilthrough the top hole A andstill holding the fixing tool,fit the rubber washer, outercopper washer, fibre washerand backnut (PTFE tape

complying to BS 6974 andsatisfying the requirementsof BS 6920 Part 1 should beapplied to threads prior tofitting the backnut to ensurethat the connection is water-tight).

Step 5Tighten up both upper andlower backnuts with the aidof a spanner and finallywithdraw the plastic tube.Do not over tighten and donot trim the rubber washeror allow it to come intocontact with any sealant.

Si dewi nder conversi on coi l

P A G E T W E N T Y O N E

8/12/2019 953009 T Yorkshire

22/32

The Yorkshire Micraversion heating element isa tubular copper heat exchanger, designedfor the easy and economic conversion of

copper direct hot water cylinders to indirect use.

It will enable the converted cylinder to functionas a purposemade unit and will operate onpumped primaries wherever combined centralheating and domestic water services are required.

Copper and copper alloys are used in themanufacture of the Micraversion. The manifoldis a gunmetal casting and all brass componentsthat come in contact with water aredezincification resistant.

Two patterns of Micraversion heating elementare available. The HE670 is for top fittingapplications and the HE400 generally for side

fittingsituations. In the latter case, one or twoelements may be installed. It is important to checkthe dimensions of the cylinder before installation.

Where to use M icraversionThe units are primarily intended for use instandard 900 x 450mm direct copper cylinderswith a capacity of approximately 120 litres.

If a Micraversion is to be installed in a nonestandard cylinder the following dimensionsshould be adhered to:

Fitted as a top entry conversion element the

HE670requires a cylinder height of at least900mm;

Fitted as a side entryconversionelement theHE400 the cylinder diameter must be at least450mm.

The Micraversion can be used in most types ofheating installations, small bore or minibore,pressurised or non-pressurised. It is alsosuitable for industrial and commercialapplications, where low output heatexchangers are required such as vats or tanks.

Performance dataMicraversion will provide domestic hot waterasshown if the primary water temperature is 85C.

Maximum temperature of water heated ina 120 litre uninsulated cylinder by HE670

Average temperature of water heated in a120 litre cylinder by HE670

Maximum temperature of water heated ina 120 litre uninsulated cylinder by a topfitted HE400

Top fitted elements will only heat water in theupper part of the cylinder.

Temperature of water heated in a 120 litreuninsulated cylinder by a bottom fitted HE400Bottom fitted elements give an eventemperature throughout the cylinder.

Installation

Step 1Drain the cylinder sufficientlyto avoid any spillage of water

when the immersion heateror blanking plug is removedfrom the cylinder boss.

Step 2Carefully fit the Micraversionto the immersion heater bossat the top of the cylinder. Or,in the case of a combinationunit, to the boss at the bottom

of the cylinder. Check that thejointing face of the cylinder

boss is clean andundamaged. Fit the elementwith the washer provided,ensuring the washer iscentral before tightening.

Step 3Tighten the element to thecylinder using a spanner onthe manifold flange only. Donot attempt to tighten theelement on the copper outlettubes or brass fittings. The

joints in this manifold are

factory sealed and shouldnot be disturbed.

Step 4The outlets may be joined tothe connecting pipework with

Yorkshire, Kuterlite or Tectitefittings. However, for ease ofservicing, we recommend theuse of Tectiteor Kuterlite.

Tubes may be shortened ifrequired to within 50mm ofthe manifold nuts. The flowconnection is clearly marked

on the manifold (with theletter F) and the inletpipework should beconnected accordingly. If theelement is installed with theconnection reversed, it will

Mi craversi on heati ng element

P A G E T W E N T Y T W O

8/12/2019 953009 T Yorkshire

23/32

Types and sizes

Standards and approvalsEach Micraversion heating element is

individually tested during manufacture.

Working temperatures and pressuresMicraversion heating elements are suitable foruse up to a maximum working pressure of 6bar at 110C.

Connecting upFlow and return connections to the elementmay be made with 15mm Yorkshire, Kuterliteor Tectite fittings. Brazed joints are notrecommended for this application.

Helpful specification clausesTo ensure the right product for the job the correctterminology to use in your specification is Allheating elements will be Micraversion drawnfrom the Yorkshire heating components range

as supplied by IMI Yorkshire Fittings Limited.

still operate satisfactorily butat a slightly reduced output.

The connecting tubes in the400mm element, installed

horizontally, may beconnected to either the flowor return.

Step 5Finally fit an air vent to thepipework as close aspossible to the returnconnection. The vent shouldbe positioned so that air canbe released from the heater.

The Yorkshire 15mm YP35is a convenient way ofachieving this. Alternativelyuse a YP24 with an RV35 air

vent inserted in the branch.

Mi craversi on heati ng element

P A G E T W E N T Y T H R E E

Yorkshire manifolds enable the main flowand return in a heating system to bedivided into smaller radiator circuits

giving improved system control, a simplesystem layout and keep circuit resistance low.Unlike more complicated systems, Yorkshiremanifolds are supplied as small basic units,which can be coupled together for largersystems. Alternatively the heating system canbezoned with a set of manifolds serving eachsector.

Where to use Yorkshire manifoldsThere are three basic designs of manifold;

Linear flow manifolds have soft copper tube

outlets in 8mm or 10mm silver brazed into abrass header. The result is a straight throughmanifold with low flow resistance.

The copper outlet tubes can be readily formedto the desired layout and connected to the

radiator pipework by means of the YorkshirePotable capillary fittings provided. Connectionto the main distribution pipework is by meansof a Yorkshire joint in the brass header.

Side entry manifolds have an integral solderring socket at one end, a male capillary end atthe other and compression outlets. This typeof manifold allows installers to bank togetherany combination of units as required.

The Micrafold is also a side entry manifold butincorporates a divider thereby giving flow andreturn in one component.

Size rangeManifolds are available in 22mm and 28mm

sizes with 8mm and 10mm outlets.

Working pressures and temperaturesYorkshire manifolds have a maximum workingpressure of 6 bar at 110C.

Standards and approvalsYorkshire manifolds are manufactured to IMIYorkshire Fittings own exacting internalquality standards.

Helpful specification clausesTo ensure the right product for the job thecorrect terminology to use in yourspecification is Yorkshire manifolds shall bedrawn from the Yorkshire heating componentsrange as supplied by IMI Yorkshire FittingsLimited.

Manifolds

FlexibilityLinear flow, side entry andMicrafold manifolds give theinstaller total flexibility wheninstalling central heatingsystems.

Overall length

Length in cylinder

Cylinder connection

Primary connectingtubes

Surface area(heating)

570mm

400mm

214"BSP

15mm

0.11m2

340mm

670mm

214"BSP

15mm

0.19m2

HE 400 HE 670Size

8/12/2019 953009 T Yorkshire

24/32

Yorkshi re accessor i es

P A G E T W E N T Y F O U R

To complete the Yorkshire range an extensiveselection of sundries and accessories isavailable providing the installer with the

additional items required to use Yorkshire

Potable fittings most effectively.The mostessential items are traditional craftsmans flux,

Yorkshire flux, Yorkshire cleaning pads, steelwool and Yorkshire heat resistant mats.

Also included in this section are pipe clips,brackets, pipe joist clips, re-rounding tools andminibore tube straighteners and benders, aswell as replacement and ancillary items for

valves and heating components. For fulldetails on the complete range of Yorkshireaccessories consult IMI Yorkshire Fittingsfittings catalogue.

Further informationYorkshire flux andTraditional Craftsmans fluxare subject to CHIP(Chemicals hazardinformation and packing

regulations). Health andsafety leaflets on theseproducts can be obtainedfrom our technical salesdepartment.

The Yorkshire accessories range includestwo specially developed fluxes traditionalcraftsmans flux and Yorkshire flux.

Extensive work has been carried out by theindustry with the objective of defining thedesirable characteristics of plumbing productsincluding soldering fluxes. It is now a WaterByelaws requirement that soldering fluxesmust not support microbiological growth inpotable water supplies. In addition, anyresidue left in the pipework after solderingshould be non-corrosive and have negligible

toxicity.The primary function of a soldering flux is toprevent oxidisation of the copper tube duringsoldering. This allows the molten solder towet the parent metals, creating a truemetallurgical bond. An efficient flux alsoensures that the maximum strength of the jointcan be achieved by aiding the distribution ofthe solder over the whole jointing surface.

Advantages of traditional craftsmansflux and Yorkshire flux

Traditional craftsmans flux and Yorkshire fluxare easy to use.

Both fluxes will maintain their consistencyover a prolonged period of time, providingcontainer lids are always firmly replaced afteruse.

Care should be taken not to introduce anycontaminants which may be transferred to the

joint.

Traditional craftsmans flux has excellentlubricating properties enabling close fitting

joints to be readily assembled. This flux is also

recommended for use with larger sized fittings.During normal heating at soft solderingtemperatures (approximately 250C) the fluxesare char resistant. They can therefore be usedwith all types and sizes of soft solder fittings.

How to use traditional craftsmans andYorkshire fluxBefore applying the flux, ensure that theoutside of the tube and the inside of the fittinghave been thoroughly cleaned. Then applyadequate, but not excessive flux to the jointingsurfaces with a brush. Do not use the finger.

The joint can now be assembled and all excessflux wiped off the outside. After heating allowthe assembly to cool and then thoroughly flushthe system, preferably with hot water. Bestresults are obtained when joints are heated assoon as possible after assembly. Any joints notheated during the working day should bedismantled, cleaned and refluxed prior toreassembly.

External residues can be removed with a dampcloth. If this is neglected staining of thepipework may occur.

PrecautionsEnsure adequate ventilation during heating.

For more information refer to health andsafety leaflets and warnings on packaging.

Fluxes

8/12/2019 953009 T Yorkshire

25/32

Yorkshire cleaning pads are speciallyproduced from a highly abrasivesynthetic material for the effective

cleaning of tube ends and fitting sockets prior

to fluxing. The pad is not electricallyconductive and can be easily washed out withwater and reused should the material becomeclogged.

Steel wool, a more traditional material usedfor cleaning tubes and fittings is available inbundles or pad form.

Effective joi ntingA perfect Yorkshire joint canonly be achieved if the fittingsocket and the outside of

the tube end are perfectlyclean. Yorkshire cleaningpads and steel wool providethe easiest way to achievethe required standard ofcleanliness.

Cleani ng pads and steel wool

P A G E T W E N T Y F I V E

Heat resi stant mats

Heat resistant mats are produced fromwoven ceramic fibres affording skirtings,paintwork or potentially flammable

materials protection, when heating YorkshirePotable joints.

Yorkshire heat resistant mats can be used toensure that floors are protected from soldersplashes and hot flux. They are useful forconserving heat in difficult situations.

Asbestos free, the mats are available in twoqualities and are supplied in handy clip-closepolythene carrier bags.

Pi pe cli ps and brackets

Acomprehensive selection of pipe clips,stems and brackets for fixing copperpipe to a variety of surfaces is available

from the Yorkshire accessories range.

Saddle bands, single and two piece spacing clipsand pipe brackets are suitable for mountingcopper pipe, both horizontally or vertically.

Where tubing needs to be mounted away froma surface, for example, where the tube needsto be insulated against heat or frost, Yorkshirepipe rings, used in conjunction with stems andbrackets are an ideal solution.

Special two part pipe joist clips are alsoavailable which reduce the effects of vibrationfrom pumps and other components in thesystem and help maintain joist strength if fittedusing the purpose designed template whichprevents excessive or inaccurate saw cuts.

Heat resistant mats

Mats will give protectionfrom the heat of a blow lampto floor boards, skirtingboards and decorations.

An important considerationCorrect clipping is essentialto ensure that pipework

systems are neat andoperate quietly and safely.

8/12/2019 953009 T Yorkshire

26/32

Gate valveIn Yorkshire gate valves theprimary sealing surfaces arein gunmetal. Flow iscontrolled by screwing thegate into the valve body.

Non re strictiveWhen the valve is fully openthe gate moves up into theheadwork to leave the flowunhindered.

Full bore valveWhen fully open, a gatevalve creates minimalrestriction to flow.

Yorkshi re valves

P A G E T W E N T Y S I X

Because different service environments placedifferent demands on pipeline systems,manufacturers of plumbing and heating

components must offer specifiers and installers

comprehensive pipeline solutions supplyingthe products needed to control and regulatethe flow of liquids and gases and constructeffective plumbing and heating systems.

With this in mind, IMI Yorkshire Fittings hasdeveloped a comprehensive selection of valves

to suit both domestic and industrial requirements,from central heating and hot and cold waterservices to oil lines, steam and gasinstallations .

Yorkshire valves are assembled using exactlythe same jointing procedure as Yorkshireintegral solder ring fittings. The Yorkshirevalves range comprises stopvalves, gate valves,plugcocks and in addition the Aquadapt, a watermeter adaptor.

Yorkshi re gate valves

Yorkshire gate valves are available inwheelhead or lockshield. Both patternsare manufactured from gunmetal and

incorporate high quality Viton O rings, able towithstand the effects of harsh serviceconditions.

Where to use Yorkshire gate valvesThe sealing mechanism of the Yorkshire gatevalve relies on a close fitting, precision madewedge positioned at a right angles to thedirection of flow thus enabling the easyregulation of hot or cold water services withminimal flow restriction.

Yorkshire gate valves are designed forconnecting to EN 1057 copper tube in hot andcold water services, central heating systems,oil lines, gas, compressed air, steaminstallations and other engineering services.

Size rangeYorkshire gate valves are manufactured fromcorrosion resistant materials includinggunmetal and are available in sizes from 15mmto 54mm.

Working pressures and temperaturesThe recommended maximum workingpressure and temperature limits for Yorkshiregate valves used in hot and cold water

services are shown in the chart below.

Standards and approvalsYorkshire gate valves are manufactured toBS 5154.

Helpful specification clauses

To ensure the right product for the job, thecorrect terminology to use in yourspecification is: All gate valves shall begunmetal, conform to BS 5154 and be drawnfrom the Yorkshire valves range as supplied byIMI Yorkshire Fittings Limited.

SizeGate valve w orking pressures

20C 110C

16 barAll sizes 6 bar

8/12/2019 953009 T Yorkshire

27/32

Safety firstTraditionally, the first valvein every dwelling is astopvalve, which allows thesupply to be cut off rapidlyin an emergency or forservicing of other fittings.

High performance valves

The stopvalve designincorporates a rubberwasher that is screweddown onto a gunmetal seatto provide a seal againstmains pressure water.

Lockshield stopvalveIn installations wherecontinuous flow is anecessity lockshieldstopvalves should be fitted.When the valve has been setusing a special key, thetamperproof headworkprevents unauthorised

adjustment.

Yorkshi re stopvalves

P A G E T W E N T Y S E V E N

Pressure drop for cold water flowing through stopvalves

The Yorkshire valves range includes acomprehensive selection of stopvalvessuitable for use with soft, half-hard and

hard copper tube. In addition to standard

patterns, stopvalves with combined draincocksand alternative headworks, includinglockshield and easy clean covers, are alsoavailable.

Yorkshire stopvalves are suitable for use withcopper tube to EN 1057. All have gunmetalbodies with gunmetal, DZR or duplex brassheadworks.

Where to use Yorkshire stopvalvesStopvalves are designed for use wherever theflow of hot or cold water services need to becontrolled or regulated. Lockshield stopvalvescan be used where operational access needs tobe restricted, for instance on exposed piperuns. Stopvalves with easy clean covers shouldbe specified for installations where thestopvalve is highly visible, particularly wherehygiene is important. The combined stopvalve

and draining tap enables easy isolation with adraining facility. Yorkshire stopvalves are alsoavailable with union ends allowing easyremoval of the valve without the need to

disturb fixed pipework.Ensure that a stopvalve appropriate to servicerequirements i.e. above ground or belowground use is selected.

Size rangeYorkshire stopvalves are available in sizesranging from 15mm to 54mm.

Working pressures and temperaturesYorkshire stopvalves are suitable for use at thefollowing working temperature and pressure.

Standards and approvalsStopvalves are manufactured to BS 1010requirements with ends to BS 864 Part 2(pr EN 1254 Part 1).

Draining taps are manufactured to BS 2879Type 1 and Type 2.

All Yorkshire stopvalves are UKWFBS listed.

Helpful Specification ClausesTo ensure the right product for the job, thecorrect terminology to use in yourspecification is: All stopvalves shall conformto BS 1010 and shall be drawn from the

Yorkshire valves range as supplied by IMIYorkshire Fittings Limited.

30 C

Workingpressure

SizeTemperature

not exceeding

16 bar15mm to 54mm

8/12/2019 953009 T Yorkshire

28/32

The Aquadapt replaces the headwork of astopvalve with a combined shut-off valve,check valve and water meter connector,

enabling the easy installation of water meters

in existing dwellings without the need to cutinto pipework.

With Aquadapt, all the installer has to do isremove the headwork of the existing incomingstopvalve, screw the Aquadapt into place, thenattach the meter.

The Aquadapt is manufactured from gunmetalor DZR brass with some stainless steel andnon-metallic components.

Aquadapt is UKWFBS listed.

Where to use AquadaptThe Yorkshire Aquadapt is suitable for bothexisting and new properties. It can be used aboveor below ground and is available in sizes whichwill suit all commonly available stopvalvesconforming to BS 1010 Part 2 and BS 5433.

Aquadapt will accept the following concentricmeters: Schlumberger P40M, Socam 501 l-Mand Kent MSM

If the meter you wish to install is not listed above,please contact your nearest IMI YorkshireFittings sales office for confirmation of suitability.

Installation1. Isolate the main supplying the stopvalvewhich is to be adapted.

2. Remove headwork from the stopvalve. Havea container handy in case a small amount ofwater escapes from the pipework.

3. Note whether a fibre washer or Oring sealhas been used to make the headwork or bodyseal. Select the same type of seal from the kitsupplied with Aquadapt. Place the new sealover the threaded portion of the Aquadapt body.

4. Ensure that the injector tube is fitted to thebody and that the rubber sealing ring on thespigot has not been dislodged. Carefully screwthe adaptor into the stopvalve body by hand, then

tighten until the gap between the adaptor andthe top of the stopvalve has closed. Do not overtighten. In the case of underground installations,the Yorkshire T bar assembly spanner (Cat NoAD30) should be used. For above groundinstallations, a 12" socket assembly spanner(Cat No AD31) should be used with a ratchetdrive to tighten the Aquadapt.

5. Ensure that the valve handle is turned to theoff position before turning the mains back on.Check for leaks.Do not turn the valve on at this stage

6. Screw the concentric meter into the top ofthe adaptor, hand tight. Ensure that the Orings on the meter are still in place.

7. If a metering facility is not requiredimmediately, the Aquadapt can be blanked offusing a Yorkshire blanking plug (cat No AD34).

8.The valve can now be turned on. If water isnot being drawn from the system, the meterpointer should be stationary.

9.Turn on a tap to check the meter is workingcorrectly.

Removal a nd refittingIf at any time there is a need to remove the meter,the valve should simply be shut off and the meterunscrewed. Water should only be lost from themeter itself when this procedure is carried out.

If required, the adaptor can be removed andreplaced into the same stopvalve body withoutproblems. If there is a need to fit the adaptor toa different stopvalve, a new injector tube shouldbe used. Simply pull out the existing tube andreplace with a new one (12" cat No AD32, 34"cat No AD33).

Aquadapt adaptor for water meters

P A G E T W E N T Y E I G H T

InstallationThe Aquadapt may bemounted either vertically orhorizontally.

Vertical installation

Horizontal mountingIf the Aquadapt is to bemounted horizontally a

Yorkshire support bracket(Cat No AD37) should beused to provide additionalsupport for the Aquadaptand adjoining pipework.

Underground installationIf the Aquadapt is to beinstalled externally, it shouldbe fitted within the boundarybox, the minimum size ofwhich must be 105mm (6")

in diameter. In this situation,we recommend that theAquadapt is fitted with a

Yorkshire extension handle(cat No AD35) to ensureeasy access and use.

8/12/2019 953009 T Yorkshire

29/32

Dimensions

Aquadapt adaptor for water meters

P A G E T W E N T Y N I N E

The Yorkshire valves range includes aselection of DZR quality plugcocks foruse with copper tube. Several patterns of

plugcock are available, the majority have an

oblong bore and are designed for use on lowpressure gas services with the remainderhaving a full round bore intended primarily foruse with low pressure water.

Where to use Yorkshire plugcocksYorkshire plugcocks are designed to controlthe flow of gas or water in low pressureinstallations. Gas plugcocks are available withunion outlet and a drophead allowing theprofile of the valve to be lowered oncecommissioned. The full round bore valve canalso be supplied with a male BSP end.

Size rangeYorkshire plugcocks are available in 15mm and22mm sizes. Plugcocks with male BSPconnections have 12" or 34" outlets.

Working pressures and temperaturesPlugcocks are designed for low pressureinstallations and are suitable for use at thefollowing working pressures and temperatures.

*For use with gas families 1 and 2 only

Standards and approvalsYorkshire plugcocks meet the requirements ofBS 1552 for use with first and second familygases.

Helpful specification clausesTo ensure the right product for the job, thecorrect terminology to use in your specificationis: All plugcocks shall conform to BS 1552andbe drawn from the Yorkshire valves range assupplied by IMI Yorkshire Fittings Limited.

Yorkshi re plugcocks

SizePlugcock working pressures

Gas* Water

350 mbarAll sizes 0.3 bar at 20C

34"

162mm124.5mm62mm A/F

60mm

Size

ABCD

12"

153mm117mm

62mm A/F60mm

A useful design featureThe quarter turn action ofYorkshire plugcocks providesan instant on/off indication.

RangeA wide variety of patternsgives the installer theflexibility to choose thecorrect valve for the job.

Working pressures and temperaturesAquadapt has a maximum working pressure of16 bar at 25 C.

Flow chart for Aquadapt installed instopvalve body

Helpful specification clausesTo ensure the right product for the job, thecorrect terminology to use in yourspecification is: Water meter stopvalveadaptors shall be Aquadapt, and be drawnfrom the Yorkshire valves range as supplied byIMI Yorkshire Fittings Limited.

8/12/2019 953009 T Yorkshire

30/32P A G E T H I R T Y

IMI Yorkshire Fittings Limited is committedto maintaining its position as one ofEuropes leading manufacturers of fittings

and valves for the plumbing and heating

industry. We aim to offer all our customershigh quality, cost effective and durableproducts an aim which springs from thephilosophy that the customer comes first ineverything we do.

IMI Yorkshire Fittings has a network of salesoffices throughout the UK, staffed by efficientand knowledgeable personnel. They will behappy to supply product information andanswer any queries you may have. Theintroduction of a new computer system meansthat we can now respond even faster tocustomer orders and enquiries, using up to theminute communication techniques, such asdocument imaging and desktop fax modems.Which also means that our ability to trackindividual orders through the system, fromreceipt to despatch, is further improved.

Our internal customer service is reinforced byexperienced external sales teams who canoffer specific technical advice and support.Because we recognise that different customershave very different needs and requirements ofour sales representatives, we have developedtwo distinct sales teams. Our general sales

representatives provide merchants andinstallers with detailed product information

and sales support and provide a constant pointof contact with the company. The contractsales force has been specifically developed tooffer support to specifiers, housebuilders and

contractors from technical advice onplumbing and heating system design to assistingwith the production of specification documents.

And if youre an installer, merchant orcontractor with a technical query about any ofour products, simply phone our technicalservices department. They will be able toanswer your questions on anything frombuilding-in dimensions to correct jointingprocedures.

Information

For further details, please contact yourregional sales office or, for general enquiries,head office.

Head officePO Box 166, Leeds LS1 1RD

Telephone (0113) 270 1104Fax (0113) 271 5275

Export salesPO Box 166, Leeds LS1 1RD

Telephone 44(0) 113 270 1104

Fax 44(0) 113 271 6250

ContactsFriendly and well informedinternal sales staff processorders and enquiries quicklyand efficiently.

RepresentativesOur external sales teams

provide