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Is check valve needed to be installed after gate valve for zone control valve?

Question asked by jelson puthussery john on Apr 23, 2018
Latest reply on May 6, 2018 by jelson puthussery john

Is check valve required to be installed after gate valve for zone control valve. There 2 scenario mentioned in NFPA 13 with check valve and without check valve. Which one should be followed.

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