ALthough logic would say you per your maintenance testing at the
system demand, that wasn't happening in many places due to the
wording in NFPA 25. The starting point is as Rich has pointed out,
many places haven't been doing any flow testing of standpipes.
Nonetheless, many have been doing only a 500 gpm test based on
25:6.3.1 (02 ed). It says: flow test at the most remote hose
connection (NOTE SINGULAR) to verify water supply still provides the
design pressure at the required flow. So what does NFPA 14 dictate
as a design pressure and flow for a single standpipe. We could
actually say 250 gpm since its says single connection and not a
single standpipe. We changed it to reflect it is to be tested at the
System Demand.
Unfortunately 25 won't be out until after the June meeting since
there are some NITMAM's.
Roland
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