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7/25/2019 Floor Control Valve
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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
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