Forward-LookingRainwater DrainageCollecting • Drainage • Saving

D-Raintank®

Funke Kunststoffe GmbHSiegenbeckstr. 15D-59071 Hamm-UentropTel.: +49 (0) 2388 3071- 0Fax: +49 (0) 2388 3071-550info@funkegruppe.dewww.funkegruppe.de

D-Raintank® - Customer Support

Advice:Further information can be found in ourTechnical Information available on request.

We support you during the design and constructionphase of your soakaway by• Project evaluation• Volumetric calculation and configuration of your project

according to ATV-DVWK-data sheet A-138 and manufacturer’srecommendations

• Planning and engineering support during design andconstruction

• Provision of site specific information on CD-ROM• Supply of conformation documentation

(EU, UBA, Specialist Reports)

Advice: For the local drainage of polluted rain wateron parking areas we offer our DIBt admitted productD-Rainclean® Channel with filter media. Pleasecontact us if you require more information on this product.

The local rainfall data determined by KOSTRA-DWD is the basis for the calculationof soakaways in Germany.

Project Questionnaire

The D-Raintank® effectively solves the problemof local drainage of rainwater!

The D-Raintank® has been especially developed for

local rain water drainage and control.

• The D-Raintank® is designed for underground use and consists of specially developedplastic modules with a storage capacity of 95 % of total volume. Compared to this,traditional gravel- or crushed rock soakaways attain approx. 30 % - 35 %, hence reducingthe necessary excavation by approximately 60%.

• The modules are light weight and their stability allows them to be combined to formalmost unlimited volume and styles of configuration. The stored rain water thenreinfiltrates or is discharged at a pre-determined and controlled rate.

• D-Raintank® is a highly economic alternative to traditional soakaways, at the same timereducing the cost to the environment.

Illustration of the trend of arearequirement in Germany until 2020Source: BBR 2004

The Problem and the Future DevelopmentThe local drainage, retention, cleaning and rainwater utilisation are fundamental to modern rainwatermanagement ensuring a long-term resource, protecting and providing cost effective provision ofclean and process water for the population.Rainwater: Large volumes of rainwater, especially with residential- and trafficked areas, are drawnfrom the natural water cycle and directly discharged to the natural drainage system. This dischargeis very expensive. Heavy rain quickly causes flooding and surcharging of sewage treatment plants.Land use: The share of residential- and traffic areas is about 12.9 % of the total area (approx.46,000 km2) in Germany. Experience has shown that half of this area is impermeable. This areamust be drained, a fact that has inevitable consequences for the water balance in general and thenatural ground water recharge in particular. In spite of renaturation, the constructed environmentrises by an average of 115 hectares daily.Local drainage: This kind of drainage supports the natural water cycleand thus discharges into the natural drainage system. It makes anessential contribution to flood protection in river basins, especially.The drainage on property is controlled by buildingregulations and site specific requirements.The soil characteristics have an importantbearing on the calculation of drainagecapacity, which will need to be approvedby the appropriate authorities.

Technical Data:Dimensions: 810 x 840 x 400 mmConnections: DN/OD 110, 160 or 200 mmVolume: 272 litres

3.67 pieces D-Raintank® = 1 m3

Storage Coefficient: 95 %Weight: approx. 15 kg / D-Raintank®

Colour: BlackMaterial: Made from 100 % high-quality ground water neutral virgin polypropylene (PP).

This material is resistant against any contaminants likely to be present in rain water and is especially hard-wearing and long-lasting.

D-Raintanks®

can be installedpiled up to 3 layers high.

400

mm

840 mm

810 mm

Volume: 0,272 m3

The head plates are designed to support highloads and allow for a cover height of up to2.00 m

D-Raintank®- Advantages at a glanceOutstanding storage capacity (95 % void)Can be used as Soakaway or AttenuationFree movement of waterSimple and quick installation reduces construction costsEnvironmentally friendly, high-quality material (PP)Flexibility of installation provides efficient use of spaceLow maintenance costsFlushableComplete package available

Traffic Load Cover Height Trench Height

Up to 2.5 t 40 – 200 cm 40 – 120 cm1 – 3 layers

SLW 60 100 – 200 cm 40 – 120 cmH 20 - 44 1 – 3 layers

Other installation depths for other countries on request

2 3

Installation Depth and Cover Height

The D-Raintank® - Application Examples

4 5

D-Raintank® in ComparisonReference unit = (1 m3)

The D-Raintank® - Successfully Installed

The D-Raintank® can be used to drain even the smallestof industrial areas. Here the option as soakaway.

Soakaway for roof drainage in industrial estates. OptionallyD-Raintank®-Freeway units can be used for the upperlayer.

The D-Raintank® – The effective infiltration trench with multiple possibilitiesIn addition to the use for catchment of water from roofed - or trafficked- areas, the D-Raintank®

may be used in new residential areas, industrial plants, sports grounds etc. as soakaway. Itscapacity to store water and gradually release it can be used for the irrigation of parks and trees.For this particular use the elements will have to be shrink-wrapped into a water-tightPE membrane and may then be used as rainwater harvesting for future use.Freeway-Elements: On request, Freeway-Elements can be installed. Silts may be flushed outand removed later.Wrapped: The D-Raintank® is wrapped in D-Raintank®-Geotextile, which filters out fines.This fabric consists of mechanically bonded polypropylene fibres (PP) for water permeability.

The InstallationThe D-Raintank® system is successfully used throughout theworld. Installation fully in accordance with manufacturersrecommendations is paramount. Specialist contractors areavailable for this purpose. Technical information containingadvice and detailed laying instructions will be sent upon request.

Soakaway system as roof drainage and for parking areas,combined with a D-Rainclean®-Channel with filter mediato treat polluted surface water.

DetailD-Rainclean®

A soakaway coated with geotextile

The installation of 4 freeway pipes

Advantage Storage Capacity Advantage Excavation Advantage Installation Time

D-Raintank®

approx. 95%Crushed Stone/Gravel

approx. 30%D-Raintank® D-Raintank®

1m3

3m3

Soakaway system with D-Raintanks® in line with areceptor unit and an overflow manhole behind.HS®-R-pipes have been used to install the connections.

Soakaway system with D-Raintanks® laid in line and witha receptor unit. HS®-R-pipes have been used to installthe connections.

Soakaway system with D-Raintanks® as overflow soakawayfor rain water storage with receptor unit. HS®-R-pipeshave been used to install the connections.

Crushed Stone/Gravel Crushed Stone/Gravel

D-Raintank® - The Complete System

6 7

D-Raintank®

Dimensions: 810 x 840 x 400 mmVolume: 0.272 m3

must be wrapped with D-Raintank® Geotextile on site

without connector

D-Raintank® Freewaywith integrated perforated

HS®-pipe DN/OD 250,flushable and suitable for cameras

D-Raintank® Freewaywith Connector SocketDN/OD 250 and perforatedHS®-pipe DN/OD 250 flushable and easyto inspect with a cctv-camera

D-Raintank® with ConnectorsDN/OD 110, DN/OD 160 andDN/OD 200

Ventilation Unit withDN/OD 110 outlet on top

DesignThe design of theD-Raintank® wasdeveloped andperfected by wellcoordinated FEMcalculations and ad-ditional experimentalresearch.

The result is a high specification andreliable product developed specifically forinstallation under trafficked areas.

D-Raintank®-under pressureLoad Bearing CapacityThe vertical and horizontal load bearingcapacity of the D-Raintank® has beenestablished within the company and byindependent accredited testing labora-tories -, sand box- and field trials. In thecourse of these trials both short and longterm installations have been tested andcomply with the necessary security factors(see page 3 “Installation Depth and CoverHeight”).

Quality AssuranceTo ensure high and consistent quality ofthe D-Raintank® virgin PP from respectedand proven sources is used. Constant internalquality control together with testing andevaluation by independent accredited testinghouses is conducted. Amongst other tests,the scope of the internal quality controlincludes monitoring dimensional consistencyand also short and long term componenttesting.

Funke Kunststoffe GmbH is DIN ISO 9001approved.

proven quality!HS®-Silt Trap Manhole DN/OD 800incl. 1 inlet and 1 outlet DN/OD 250debris collection with stainless steel basket,2 overflow pipes, telescopic pipe andsealing ring, for water catchment areas ofup to 1.500 m2

Products for rain water managementAll elements described combine together to provide a high-performance drainage system. Supplementaryproducts such as receptor units, cast-iron covers, connector sets and drill bits complete the system.

D-Raintank®-GeotextileMechanically bonded geotextilemade from PP fibres withCE-Marking, GRK 3Roll dimensions:2.95 width x 20.0/100.0 m lengthand 5.90 width x 100.0 m length

Receptor Unit DN/OD 315incl. 1 inlet and 1 outlet DN/OD 160,silt trap for water catchment areasup to 400 m2

Total height incl. cover: 1.000 mm

Receptor Unit DN/OD 315silt trap incl. pre-drilled orifice plate,connection DN/OD 110,exterior overflow-pipe DN/OD 110Total height incl. cover: 1.000 mm

HS®-Flow Control/Overflow ManholeDN/OD 800incl. adjustable orifice plate, telescopicpipe and sealing ring DN/OD 200,outlet DN/OD 160 complete withoverflow pipe DN/OD 160

HS®-Silt Trap Manholeincl. 1 inlet and 1 outlet DN/OD 250,stainless steel filter, telescopic pipe andseal, for water catchment areas up to2.000 m2

HS®-Silt Trap ManholeDN/OD 800with D-Raintank® Freeway

Long-term test with verticalextreme load

Long-term test procedures conductedby independent testing institutions

Continuous quality control proceduresensure the reliability of the products

Forward-LookingRainwater DrainageCollecting • Drainage • Saving

D-Raintank®

Funke Kunststoffe GmbHSiegenbeckstr. 15D-59071 Hamm-UentropTel.: +49 (0) 2388 3071- 0Fax: +49 (0) 2388 3071-550info@funkegruppe.dewww.funkegruppe.de

D-Raintank® - Customer Support

Advice:Further information can be found in ourTechnical Information available on request.

We support you during the design and constructionphase of your soakaway by• Project evaluation• Volumetric calculation and configuration of your project

according to ATV-DVWK-data sheet A-138 and manufacturer’srecommendations

• Planning and engineering support during design andconstruction

• Provision of site specific information on CD-ROM• Supply of conformation documentation

(EU, UBA, Specialist Reports)

Advice: For the local drainage of polluted rain wateron parking areas we offer our DIBt admitted productD-Rainclean® Channel with filter media. Pleasecontact us if you require more information on this product.

The local rainfall data determined by KOSTRA-DWD is the basis for the calculationof soakaways in Germany.

Project Questionnaire