My prior post should have been a little less ambiguous since we have already
broached the topic this month.
I see the check valve in the 2007 and 2010 editions of NFPA 13 but am a
little perplexed by a number of older 1996-ish combination systems that have
the check valves installed in them y
Section NFPA 14, 6.2.5.1 was revised in the 2003 ed. to require the
check valve in addition to a control valve for all sprinkler connections
to a standpipe.
Steve Leyton
Protection Design & Consulting
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Dave,
14 has had the "loop" with check valves in there for awhile while the
single combined standpipe riser / system with a check valve didn't come
into play until 14 (03ed)section 6.2.5.1
Dewayne Martinez
Design Build Fire Protection
New Berlin, WI
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