We are having this same conversation regarding hydraulic test of manual dry standpipe systems in parking garages.
NFPA-25 (2023) § 6.3.1.1 is only applicable to Automatic Systems, not Manual Systems. Thank you, Jackie “JW” Ward 1-405-240-7076 From: Brandon Bridgford <[email protected]> Sent: Friday, February 28, 2025 12:43 PM To: [email protected] Subject: [Sprinklerforum] Class 1 Flow Test Good Afternoon, I am performing a 5-year flow test for a single-story data center that has 2. 5” outlets through the hallways. The calc plate says it is designed for a discharge rate of 1000gpm, when supplied with water at the rate of 1250gpm Good Afternoon, I am performing a 5-year flow test for a single-story data center that has 2.5” outlets through the hallways. The calc plate says it is designed for a discharge rate of 1000gpm, when supplied with water at the rate of 1250gpm at 69psi at the base of the riser. Hose stream allowance of 1000gpm is included. There is no fire pump, and the static pressure is approximately 72psi. I flowed the farthest outlet with a flow meter, and I was able to get 425gpm with a residual of 62 at the base of the riser. The AHJ wants testing to be performed per NFPA 25. Would this mean I need to flow 1000 or 1250gpm simultaneously? I will need a pump truck to achieve these numbers. Any thoughts or advice would be greatly appreciated. Thank you! [cid:[email protected]]
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