Thanks all. The field expert in question got question of the month as I never envisioned more than 40 on these type of systems.
R/ Matt -----Original Message----- From: Steve Leyton <[email protected]> Sent: Wednesday, October 20, 2021 3:10 PM To: [email protected] Cc: Matthew J Willis <[email protected]> Subject: RE: Supervised Air Manual Dry Standpipe Since the intended purpose of the supervisory air is to alert ownership or a service contractor of leaks or damage, and doesn't factor in functionality of the system the way it would if the system was equipped with a dry-pipe valve, I don't see where it would be required. Not a bad practice, but no necessarily required. I'm pretty sure we've never discussed this in committee, so the standard says what it says and an AMD isn't currently in that conversation. If any other TC members have a different recollection, please chime in. The foregoing is my opinion only and does not represent NFPA or the NFPA 14 Technical Committee, nor intended to serve as an interpretation of the standard. Protection Design and Consulting Steve Leyton, President T | 619.255.8964 x 102 | www.protectiondesign.com 2851 Camino Del Rio South | Suite 210 | San Diego, CA 92108 Fire Protection System Design | Consulting | Planning | Training -----Original Message----- From: Sprinklerforum <[email protected]> On Behalf Of Matthew J Willis via Sprinklerforum Sent: Wednesday, October 20, 2021 1:51 PM To: [email protected] Cc: Matthew J Willis <[email protected]> Subject: Supervised Air Manual Dry Standpipe Having an interesting discussion with a senior field man. He is concerned that some of the compressors pump to 125 +/-, and was asking about an AMD. I have searched, and also from a hands-on standpoint, do not believe one is required. It certainly is if we introduce a dry valve or deluge into the standpipe system, but then it gets a different name. NFPA 72 only mentions a 10 psi differential for supervisory circuits with air. Is an AMD required on this type standpipe? R/ Matt Matthew J. Willis Design Manager / Code Compliance 1530 Samco Road, Rapid City, SD 57702 Office-605.348.2342 /Direct-605.593.5063/Cell-605.391.2733 _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
