Independent reviewer representing the city.
Taylor Schumacher ET From: Matt Grise <m...@afpsprink.com> Sent: Friday, August 05, 2022 9:50 AM To: Discussion list on issues relating to automatic fire sprinklers <sprinklerforum@lists.firesprinkler.org> Subject: [Sprinklerforum] Re: WFD In Pump Suction Line Just out of curiosity - who does this plan reviewer work for? Is it an owner's rep/engineer/insurance rep or a city code official? Matt From: Taylor Schumacher <tay...@sfsprinkler.com<mailto:tay...@sfsprinkler.com>> Sent: Friday, August 05, 2022 9:43 AM To: Discussion list on issues relating to automatic fire sprinklers <sprinklerforum@lists.firesprinkler.org<mailto:sprinklerforum@lists.firesprinkler.org>> Subject: [Sprinklerforum] Re: WFD In Pump Suction Line I thought about using the turbulence distances as a good practice. I have over 200 feet of pipe so the turbulence would not be a factor. The likelihood of the paddle becoming lodged and blocking water supply or worse getting sucked into the pump is the concern. We all know there is no code requirement for that installation. For what it's worth, the pipe is traveling in a parking garage. Taylor Schumacher ET From: Matt Grise <m...@afpsprink.com<mailto:m...@afpsprink.com>> Sent: Friday, August 05, 2022 8:45 AM To: Discussion list on issues relating to automatic fire sprinklers <sprinklerforum@lists.firesprinkler.org<mailto:sprinklerforum@lists.firesprinkler.org>> Subject: [Sprinklerforum] Re: WFD In Pump Suction Line I get the concern also - but the request seems to be in direct contradiction to the code. And it introduces a paddle that could jam in the pipe or detach from the switch and flow into the pump. Many plan reviewers are limited to enforcing codes, not enforcing their personal preferences. Can they produce a code section that requires monitoring in this portion of the system? There are ways to detect flow without a paddle sensor - maybe an alternate detection method? If it must be there, I would say at least 50' upstream of the pump similar to a butterfly valve. Matt From: Taylor Schumacher <tay...@sfsprinkler.com<mailto:tay...@sfsprinkler.com>> Sent: Friday, August 05, 2022 8:35 AM To: 'sprinklerforum@lists.firesprinkler.org' <sprinklerforum@lists.firesprinkler.org<mailto:sprinklerforum@lists.firesprinkler.org>> Subject: [Sprinklerforum] WFD In Pump Suction Line Does anyone have any experience with a paddle-type water flow detector in the suction line of a fire pump? I have a long section of pipe between my backflow preventer and the suction flange of my pump that a plan reviewer wants supervised. I get the concern, but I have concerns with the paddle in the suction piping. Any thoughts or experiences are greatly appreciated. Taylor Schumacher ET
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