7/25/2019 Floor Control Valve

1/1

A.8.17.4.6 Where backflow prevention devices are installed,they should be in an accessible location to provide for serviceand maintenance.

A.8.17.4.6.1 The full flow test of the backflow preventionvalve can be performed with a test header or other connectiondownstream of the valve. A bypass around the check valve inthe fire department connector line with a control valve in thenormally closed position can be an acceptable arrangement.

When flow to a visible drain cannot be accomplished, closed

loop flow can be acceptable if a flowmeter or site glass is incor-porated into the system to ensure flow. When a backflow pre-

vention device is retroactively installed on a pipe schedule sys-tem, the revised hydraulic calculation still follows the pipeschedule method of 11.2.2 with the inclusion of friction lossfor the device.

A.8.17.5.1.1 One and one-half inch (40 mm) fire hose packsare not required unless designated by the authority having

jurisdiction, as it is not likely that such hoses will be adequatelymaintained for safe use by first responders. Civilian workers

who are not properly trained in fire-fighting techniques areexpected to evacuate the building in the event of a fire.

A.8.17.5.1.4 This standard covers 112in. (40 mm) hose con-nections for use in storage occupancies and other locations

where standpipe systems are not required. Where Class IIstandpipe systems are required, see the appropriate provisionsof NFPA 14 with respect to hose stations and water supply forhose connections from sprinkler systems.

A.8.17.5.2.2 See Figure A.8.17.5.2.2(a) and FigureA.8.17.5.2.2(b).

30

0 150

120

9060

Indicating-type floor control valvewith supervisory switch

Waterflow switch

Pressure gauge

Feed main

Sectionaldrainvalve

To drain

Riser Test valve

Sight glassUnion with corrosion-resistant orificegiving flowequivalent tothe smallestsprinklerorifice inthe system

FIGURE A.8.17.4.2(b) Floor Control Valve.

See note

Branch line

Pitch

Test valve in accessiblelocation

Plug for testing remove

and install temporaryconnection

Union

45ell

Smooth borecorrosion-resistant outletgiving flow equivalentto one sprinkler

Note: To minimize condensation of water in the drop to thetest connection, provide a nipple-up off of the branch line.

FIGURE A.8.17.4.3 System Test Connection on Dry PipeSystem.

Tosprinklersystem

Indicating-type floor controlvalve with supervisory switch Check

valve

PressuregaugeWaterflowswitch

Combination sprinkler/standpipe riser

Inspectorstest and drainconnection

Drainriser

Fire hose valve

FIGURE A.8.17.5.2.2(a) Acceptable Piping Arrangement forCombined Sprinkler/Standpipe System. [14:Figure A.6.3.5(a)]

Tosprinklersystem

Indicating-type floor controlvalve with supervisory switch Check

valve

Pressuregauge

Waterflowswitch

Combination sprinkler/standpipe riser

Inspectorstest and drainconnection

Drainriser

2in.(65 mm) min.

Fire hose valve

FIGURE A.8.17.5.2.2(b) Acceptable Piping Arrangement forCombined Sprinkler/Standpipe System. [14:Figure A.6.3.5(b)]

13310 INSTALLATION OF SPRINKLER SYSTEMS

2013 Edition

4/2012yright National Fire Protection Association

--`,,`,,,``,`,,,`,`,,``,,,,,``,`-`-`,,`,,`,`,,`---