I would not think so as long as the delays are adjusted correctly. John August Denhardt, P.E. Strickland Fire Protection
On Nov 6, 2018, at 4:09 PM, Fpdcdesign <[email protected]<mailto:[email protected]>> wrote: This is being done per the 2010 edition before that text was added. The only requirements I see in that version for a check valve is if you are connecting to a combination sprinkler standpipe riser (and if the zone valves are interconnected). My question was more of an operational one as opposed to a Code one. Are two flow switches on different branches in close proximity subject to simultaneous operation? Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT 860-535-2080 (ofc) 860-553-3553 (fax) 860-608-4559 (cell) On Nov 6, 2018 at 3:48 PM, <John Denhardt<mailto:[email protected]>> wrote: I agree. Check valves are required. John John August Denhardt, P.E. Strickland Fire Protection On Nov 6, 2018, at 3:41 PM, Mike Stossel <[email protected]<mailto:[email protected]>> wrote: If I am understanding you question correctly, check valves are required. 8.16.1.5 Floor Control Valve Assemblies. 8.16.1.5.1* Multistory buildings exceeding two stories in height shall be provided with a floor control valve, check valve, main drain valve, and flow switch for isolation, control, and annunciation of water flow on each floor level. Mike Stossel SET <image002.png> 36 Barren Road East Stroudsburg, PA 18302 Office: 973-670-2627 [email protected]<mailto:[email protected]> From: Sprinklerforum <[email protected]<mailto:[email protected]>> On Behalf Of Fpdcdesign Sent: Tuesday, November 6, 2018 3:38 PM To: Sprinklerforum <[email protected]<mailto:[email protected]>> Subject: Back to back floor controls. I am working on an existing two story plus attic wood frame building. The engineer is requiring zone control assemblies (butterfly valve plus riser manifold) for every level including the attic. I have designed it so there is a bull head tee at the top of a 4” riser with the assemblies on either side of the tee. Given that the flow switches are going to be in close proximity, should I install a check valve between the butterfly valve and the manifold? Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT 860-535-2080 (ofc) 860-553-3553 (fax) 860-608-4559 (cell) _______________________________________________ Sprinklerforum mailing list [email protected]<mailto:[email protected]> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected]<mailto:[email protected]> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected]<mailto:[email protected]> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
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