We're designing a Wet Manual Class I standpipe in a low-rise building with 4 stairs/standpipes and therefore 4 isolation valves. There are 7 total levels of this building.
The horizontal supply pipe must be located in the level 5 ceiling.
Is it allowable to locate the standpipe isolation valves at this 5th level versus the more typical location near the bottom of each standpipe?
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