We have a project where the AHJ is telling us they want the waterflow alarm to be silenceable. Our understanding under NFPA 13-2019 7.7 and 184.108.40.206 is that there must be an audible alarm within 90 seconds (per NFPA 72) and must continue until the flow stops, not when the fire alarm system silences the flow.
Are we correct in that waterflow is a non-silenceable event, by code?
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11/13/2020 10:15:01 am
Remember to look at the opening pages of every NFPA standard: The AHJ may make interpretations as they see fit, and may also direct the Building Owners (and their contractors) to follow rules, procedures and orders that may alter what the relevant NFPA standard has published.
11/13/2020 10:15:12 am
As an AHJ, we require an exterior horn/strobe above the FDC. This H/S is to be programmed to activate upon waterflow and not able to be silenced until waterflow stops. This exterior H/S fulfills the requirements of 7.7 and 220.127.116.11.
11/13/2020 12:03:48 pm
7.7 indicates that an audible alarm should be available on the premises within 5 min after the flow begins and until such flow stops.
Jason Lupa, PE
8/19/2021 08:51:47 am
A fire department connection (FDC) is required for most automatic sprinkler and standpipe systems. Fire apparatus can connect supply hoses to the FDC to pump additional water/ pressure into the suppression system.
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