If you calculate it based on the truck alone with the 1500 gallon
tank, at a 1000 gpm demand, you have enough water for 1-1/2 minutes.
I am not a fire fighter, but I wouldn't go into a burning building to
hook up to a standpipe when I know I'm going to be out of water in 90
seconds. What you have for a supplemental water supply (public, pond,
tank truck, etc.) will probably guide your design. There may be ways
to throttle the pump on the truck so as not to over pressurize.
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Dewayne
Martinez
Sent: Tuesday, April 10, 2007 10:23 AM
To: SprinklerFORUM
Subject: Manual wet standpipes
We have a discussion in our office on the correct way to calculate a
manual wet standpipe.
Our local fire department pumper trucks are set for 150PSI @ 1500 GPM
and contain a 1500 gallon tank For calculating a manual wet standpipe
back to the fire department connection, should we only use the rated
capacity of the pumper truck or are we allowed to add in the city water
pressure/flow available at the hydrant at which they hook up to? IE:
Either treat it as a stand alone fire pump off a tank or as a standard
fire pump w/ city water supply added in.
Thanks,
Dewayne
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Vince Sabolik
Christi Fire Protection, Inc.
11351 Pearl Road
Strongsville, Ohio 44136
T 440 572-7730 F 440 572-7719 Email:
<mailto:[EMAIL PROTECTED]>[EMAIL PROTECTED]
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Todd G. Williams, PE
Fire Protection Design/Consulting
Stonington, Connecticut
860-535-2080
www.fpdc.com
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