We have a 5-story building with wet manual standpipes in three stairwells. A single FDC connects to the end of a manifold in the riser room that has a 4-inch dry system, a 4-inch wet sprinkler, and a 6-inch riser that supplies the three standpipes. Each standpipe has a separate isolation valve at its stair tower. One of the standpipes is a combination standpipe/riser with sprinkler floor control valves for levels 2-5.
Regarding the 6-inch standpipe riser off of the manifold:
Is a control valve required, or allowed?
Is a check valve required?
Is a flow switch required, or recommended?
This project is under NFPA 14-2013 Edition. Thanks.
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