I used a similar phrase during the phone call to point me to the section where it is required.
He was/is unable to supply code references for that requirement and pointed it out as such-it is merely a recommendation as he is concerned about damage to the piping or fittings causing water to flow without any alarms or notifications. It was never a concern about adequate suction pressure. Thanks for all the responses! Taylor Schumacher ET From: Ken Wagoner <k...@parsleyconsulting.com> Sent: Friday, August 05, 2022 10:05 AM To: Discussion list on issues relating to automatic fire sprinklers <sprinklerforum@lists.firesprinkler.org>; Taylor Schumacher <tay...@sfsprinkler.com> Subject: Re: [Sprinklerforum] WFD In Pump Suction Line Taylor, After reading your original post, and several of the responses, particularly that of Chris Dorn, I'm prompted to share my thoughts. * Is the AHJ looking for supervision of the appropriate suction pressure in that feed to the fire pump? I'm sure you understand this - however the AHJ may not - a 'paddle type' switch is only going to provide notification if the line is flowing. It won't report any information in a static condition. * If the concern is indeed to supervise the suction pressure at a certain level in the supply to the fire pump a pressure switch would be better suited for this purpose. The switch settings could be established at the required suction pressure, and any reduction in that pressure would activate the switch, and transmit the supervisory notice to the fire pump controller or fire alarm panel, whichever is preferred. * If it is only supervision of actual flow in the line as others have pointed out there are better choices than a paddle type switch. It's also worth noting that the pump controller may already have the supervision the AHJ is suggesting. Finally, as one other poster has noted - if there is a section of the applicable code or standard which requires supervision of the suction line to a fire pump, then I would request direction to the section. If it's there, then I'll do what it requires, as I want to follow the 'rules' as closely as possible. If it's not there, and it's just the AHJ's preference, then what are we talking about? That concept has guided most of my work, which I've boiled down to 'prove it.' My late father's take on this was, "Put up, or shut up." sincerely, Ken Wagoner, SET Parsley Consulting 500 West Mechanic Street Harrisonville, Missouri 64701-2235 Phone: (760) 745-6181 Visit the website<https://linkprotect.cudasvc.com/url?a=http%3a%2f%2fwww.parsleyconsulting.com%2f&c=E,1,Y5zKJKPEh1mBEBqSR-VE9cUKl5y-eyP8BpvmE_5j9ZqW2eJbNphYzrCMBZ-2YuX6d-RRkHI4gQ1FV-cvOeCfRC58uZS9NiToZv2mx7909oCqLvCW_n5hDHeK&typo=1>
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