Zone Valves

Posted by | Apr 11, 2018

In the 2015 and 2012 edition of NFPA 99, 5.1.4.5.3 says, “Service valves shall be placed in the branch piping prior to any zone valve box assembly on that branch.” Does that mean that on each pipe, to each zone valve box, there shall be a valve that will allow the zone valve to be isolated?

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