We discussed a prohibition on concealed dry standpipes two or three cycles ago – we may even have put that in the standard. However, the current language of 6.1 was determined to be a better universal solution: ALL dry standpipes shall be supervised with air. This allows protection of piping 6.1.2.2 …
The foregoing is my opinion only and is not intended to represent the NFPA 14 Technical Committee, nor serve as an interpretation of the standard. Steve Leyton Protection Design & Consulting San Diego, CA From: Sprinklerforum [mailto:[email protected]] On Behalf Of Zachary Siegrist Sent: Monday, April 03, 2017 12:58 PM To: [email protected] Subject: Concealed standpipe riser - manual dry I'm not seeing anything in NFPA 14 not allowing the concealment on standpipe piping. However, I feel this may create a problem with the 5 year dry standpipe system hydrostatic test required per NFPA25. 6.3.2.3 of NFPA25 states that inside standpipe piping shall show no leakage. If the piping is concealed, how does one determine if leakage is present? NFPA 13 allows either a drop in gauge pressure or visual leakage for the hydrostatic test of sprinkler systems, but 25 is not worded this way. Thoughts on whether this arrangement should be allowed? Maybe use supervised air? Zach
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