I believe the 65% requirement is a basis for the fire pump to be listed, not for field testing.
Performance test results is to be compared to two items: * Downstream system demand * 95% of Rated / Acceptance Test Performance (Your 78%); 74.1%. Look first at the Amperage / RPM and adjust your results accordingly. Compare to previous tests to see if you identify a trend. Thank you, Jackie “JW” Ward 1-405-240-7076 From: Fpdcdesign <[email protected]> Sent: Wednesday, October 15, 2025 2:50 PM To: Sprinklerforum <[email protected]> Subject: [Sprinklerforum] Pump requirement at 150% flow I received and was asked to comment on a test report from a pump that failed. The pump is an electric 1000 gpm at 100 psi unit. One of the curious things on the report is that they are looking for 78% of rated pressure at 150% rated flow. NFPA I received and was asked to comment on a test report from a pump that failed. The pump is an electric 1000 gpm at 100 psi unit. One of the curious things on the report is that they are looking for 78% of rated pressure at 150% rated flow. NFPA 20 calls for 65%. Before I shoot my mouth off, is there any justification for this? Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT 860-535-2080<tel:860-535-2080> (ofc) 860-554-7054<tel:860-554-7054> (fax) 860-608-4559<tel:860-608-4559> (cell)
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