Tony,
I would defer to Steve Leyton on this, however my thought is that
if there is a check valve upstream
of the FDC, when the pumper delivers flow and pressure, that valve is
going to shut, and the city flow
is not going to be a factor, save through the pumper truck.
*Ken Wagoner, SET
*Parsley Consulting***
*350 West 9th Avenue, Suite 206
*Escondido, California 92025
*****Phone 760-745-6181*
Visit our website <http://www.parsleyconsulting.com/> ***
On 03/14/2016 3:23 PM, Tony Eggster wrote:
Quick question: I'm reviewing some plans for a manual class I standpipe and
the designer added the city flow test to the usual 1000gpm fire pumper
curve in order to keep all the pipe down to 4". I see in the NFPA 14
appendix that you can do this but personally I've always just calculated
solely to the pumper curve. How do you guys do it?
Also, I'm assuming that if you do factor in city supply wouldn't that
frequently require high pressure pipe and fittings depending on city supply
psi?
_TONY
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