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 28.2.3.1 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? Posted anonymously for discussion. Discuss This | Submit Your Question | Subscribe
3 Comments
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.
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Jake
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 28.2.3.1.
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Franck
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.
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