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:jdenha...@stricklandfire.com)> 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 <m...@knssprinkler.com > (mailto:m...@knssprinkler.com)> 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 > > > > > > > > m...@knssprinkler.com (mailto:m...@knssprinkler.com) > > > > > > > > > > > > > > > > > > > > > > From: Sprinklerforum <sprinklerforum-boun...@lists.firesprinkler.org > > (mailto:sprinklerforum-boun...@lists.firesprinkler.org)> On Behalf Of > > Fpdcdesign > > Sent: Tuesday, November 6, 2018 3:38 PM > > To: Sprinklerforum <sprinklerforum@lists.firesprinkler.org > > (mailto:sprinklerforum@lists.firesprinkler.org)> > > 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 > > Sprinklerforum@lists.firesprinkler.org > > (mailto:Sprinklerforum@lists.firesprinkler.org) > > > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > > _______________________________________________ Sprinklerforum > > mailing list Sprinklerforum@lists.firesprinkler.org > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > >
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