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.
Based on the information provided, 2016 NFPA 13 Section 220.127.116.11.2.2 installation requirements for floor control valves and Section 18.104.22.168.3 installation requirements for check valves do not restrict or require the valve as you describe.
What circumstances made to ask the question?
Which edition of NFPA 13 are you using?? I think it changed a couple of editions ago
And there is more information to respond to:
I couldn't find the term "zone valve" in NFPA 13. I even looked in the NFPA Glossary of Terms- no luck.
Is this what we are talking about? Floor control valves.
Check valve not required for riser without stand pipe connection according to 2013 NFPA 13 Section 22.214.171.124
Check valve required by 2013 Section 126.96.36.199.2
Jelson help us out here.
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