I'm not lucky enough to be able to treat the FDC on a wet automatic standpipe as supplemental am I?
We have a building with a combined sprinkler and standpipe system that's wet automatic. Building is 8 stories, but separated. etc. etc. Since the standpipe is wet automatic, the FDC isn't the only supply source, so do we still have to calculate it hydraulically? Total standpipe demand is 1000 GPM We're using NFPA 14, 2013 edition. Basically, I'm trying to figure out if its OK to run 4" to the FDC and use a single Siamese instead of 6" piping to a 4-way or two Siamese connections. Benjamin Young
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