Dry system with K=4.2
Dry system with K=4.2
(OP)
NFPA 13 2007 SEC 8.3.4.3 Makes reference to galvanized piping on dry systems when using k=4.2 spkr heads. Does galvanized piping mean just the pipe or the pipe and fittings
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RE: Dry system with K=4.2