I don't know for sure what the actual numbers are, and it's widely accepted that a lot of fire incidents are under-reported or not reported in detail to the extent that nuance or extenuating circumstances are accurately reflected. That said, NFPA has been relying on rough numbers for several years to assess sprinkler system failures: 80% of all sprinkler system failures are attributable to encumbrance of water supply and 80% of those impairments are wholly or partially closed valves. So 2/3 of all failures are due to close valves, admittedly in simplistic terms.
So adding sectional valves for convenience or some preemptive purpose that I can't really imagine right now, is a risk and one that goes against my basic principles of K.I.S.S. and keeping the chain of events as short as possible. Each additional valve is a link that can fail and removing the link prevents that potential occurrence. My 2ยข only, Steve L. From: Brian Harris <bhar...@bvssystemsinc.com> Sent: Wednesday, August 16, 2023 12:25 PM To: sprinklerforum@lists.firesprinkler.org Subject: [Sprinklerforum] Control/Sectioning Valves Is there anything inherently wrong with installing control valves within a system to isolate certain areas? Say for instance you have a strip mall fed from one system and you want to add control valves within that system to isolate certain stores without interrupting service to the rest. I understand It needs monitoring and draining but is there anything else to consider? Brian Harris, CET BVS Systems Inc. bvssystemsinc.com<http://bvssystemsinc.com/> Phone: 704.896.9989 Fax: 704.896.1935
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