John NFPA 25 -2020 13.2.3 MAIN DRAIN TEST. Shall be conducted annually for each water supply lead-in to a building. 13.2.3.1 Where the lead-in to a building supplies a header or manifold serving multiple systems, A single main drain test shall be permitted. Of course as you state the AHJ must be consulted as they may require each system to be tested.
From: John Denhardt <[email protected]> Sent: Thursday, May 11, 2023 10:41 AM To: Discussion list on issues relating to automatic fire sprinklers <[email protected]> Subject: [Sprinklerforum] Re: [EXTERNAL] Re: Fire Pump Drains Craig - I see this when a main test is required by the AHJ on any system supplied by a fire pump system. I also recommend testing all water flow devices with the fire pump system in its normal operating condition. Each system is considered a separate system. Each system is supposed to have an annual main drain test. On acceptance test, the main drain is supposed to be recorded on the General Information sign for each system and the Aboveground Test Certificate. The original main drain test data is then to be used for comparison to annual NFPA 25 test data. I recommend main drain test are conducted with the fire pump in its normal operating condition. John John August Denhardt, P.E. Vice-President Engineering and Technical Services American Fire Sprinkler Association 301-343-1457 On May 11, 2023, at 12:31 PM, Prahl, Craig <[email protected]<mailto:[email protected]>> wrote: John, I’m not sure of a situation or purpose where you’d have the pump running and be discharging flow through a 2” system drain. A drain on the fire pump discharge piping to be able to drain it before doing maintenance would be helpful. Craig Prahl | Jacobs | Group Lead/SME – Fire Protection | [email protected]<mailto:[email protected]> | www.jacobs.com<https://linkprotect.cudasvc.com/url?a=https%3a%2f%2fnam02.safelinks.protection.outlook.com%2f%3furl%3dhttps%253A%252F%252Furldefense.com%252Fv3%252F__http%253A%252Fwww.jacobs.com%252F__%253B%21%21KZTdOCjhgt4hgw%21-_khxU8gU0_6jc895I7kRbnU8JghRDsWgqOblZ4jr7Qp2IVbR30VYw_hWvNFtphnl0uWpB9KIvbYi1pvZz4%2524%26data%3d05%257C01%257Cjdenhardt%2540stricklandfire.com%257C3505a82b279142dcd6fd08db524564e2%257Cd658cbf30820420e8485ef2e373e8459%257C0%257C0%257C638194230232120314%257CUnknown%257CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%253D%257C3000%257C%257C%257C%26sdata%3ddBHPJuUVyx4PXT1uFe7wGjGyTHqKCJQWXfJ%252FsK2m3hk%253D%26reserved%3d0&c=E,1,yemVXhqjjK-8EqbQNunPIjbTxGLilt1HUSSVQMW1F43yrrkY8plQDGFi4l4f_1QhQkQ0WBaRxcbZRj_HXGJa57SNHegW8XDqL7sjWtiQ&typo=1> 1041 East Butler Road Greenville, South Carolina 29606 CONTACT BY: Phone 1-864-676-5252, Email or MS TEAMS From: John Denhardt <[email protected]<mailto:[email protected]>> Sent: Thursday, May 11, 2023 1:17 PM To: Discussion list on issues relating to automatic fire sprinklers <[email protected]<mailto:[email protected]>> Subject: [EXTERNAL] [Sprinklerforum] Re: Fire Pump Drains Craig - 100% agree. All systems need a main drain piped to an acceptable place of discharge that can handle full flow with the fire pump system (if provided) operating. There should also be a method to drain the fire pump system piping. John John August Denhardt, P.E. Vice-President Engineering and Technical Services American Fire Sprinkler Association 301-343-1457 On May 11, 2023, at 12:12 PM, Prahl, Craig <[email protected]<mailto:[email protected]>> wrote: I’m not sure I understand the correlation between system drains and the subject of this post? There needs to be a drain from each sprinkler system valve, wet, dry, PA or Deluge, doesn’t matter. There needs to be a drain in the fire pump room. Craig Prahl | Jacobs | Group Lead/SME – Fire Protection | [email protected]<mailto:[email protected]> | www.jacobs.com<https://linkprotect.cudasvc.com/url?a=https%3a%2f%2fnam02.safelinks.protection.outlook.com%2f%3furl%3dhttps%253A%252F%252Furldefense.com%252Fv3%252F__https%253A%252Fnam02.safelinks.protection.outlook.com%252F%253Furl%253Dhttps%2a3A%2a2F%2a2Furldefense.com%2a2Fv3%2a2F__http%2a3A%2a2Fwww.jacobs.com%2a2F__%2a3B%21%21KZTdOCjhgt4hgw%21-_khxU8gU0_6jc895I7kRbnU8JghRDsWgqOblZ4jr7Qp2IVbR30VYw_hWvNFtphnl0uWpB9KIvbYi1pvZz4%2a24%2526data%253D05%2a7C01%2a7Cjdenhardt%2a40stricklandfire.com%2a7C2129380d08804f1fd3e008db5242e1ae%2a7Cd658cbf30820420e8485ef2e373e8459%2a7C0%2a7C0%2a7C638194219452249732%2a7CUnknown%2a7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%2a3D%2a7C3000%2a7C%2a7C%2a7C%2526sdata%253DeXdq3TZwd5ABk9RVJ3GeROxeZtLDhqKF1K%2a2Fqh8I32Uw%2a3D%2526reserved%253D0__%253BJSUlJSUlJSUlJSUlJSUlJSUlJSUlJSUlJSUl%21%21B5cixuoO7ltTeg%21HiCuRAlm_f8hPDx_4h0wfAR2fNG3K8-6p5IX2VwYH7JupHpvt4E65t88GlZK7TRiJGojm3tX5QoabwjBUmK4OevjLQ%2524%26data%3d05%257C01%257Cjdenhardt%2540stricklandfire.com%257C3505a82b279142dcd6fd08db524564e2%257Cd658cbf30820420e8485ef2e373e8459%257C0%257C0%257C638194230232120314%257CUnknown%257CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%253D%257C3000%257C%257C%257C%26sdata%3dr0uz99GBAZa9pqcEQ5LHPnD3rWzzWWzwC1mX%252BZ7hMq4%253D%26reserved%3d0&c=E,1,Ji7RoSka2w_Wnb8s2w6mGAXVQwQ_BKagTtUZZl4FDG3jsb6vIQlgOjTvrbLj7n3J0FhMzVpuvudapQZkT1p3LtKsbaMT3BCzBclxE0AE-MQY_Ex3dDbTPDQ,&typo=1> 1041 East Butler Road Greenville, South Carolina 29606 CONTACT BY: Phone 1-864-676-5252, Email or MS TEAMS From: Brian Harris <[email protected]<mailto:[email protected]>> Sent: Thursday, May 11, 2023 11:23 AM To: [email protected]<mailto:[email protected]> Subject: [EXTERNAL] [Sprinklerforum] Fire Pump Drains Installing a Dry system fed from a pump and while running the 2” drain outside the building from the dry valve it dawned on me we never show a drain for the wet system. I’m assuming that’s taken care of from the casing drain on the pump? Brian Harris, CET BVS Systems Inc. bvssystemsinc.com<https://linkprotect.cudasvc.com/url?a=https%3a%2f%2fnam02.safelinks.protection.outlook.com%2f%3furl%3dhttps%253A%252F%252Furldefense.com%252Fv3%252F__https%253A%252Fnam02.safelinks.protection.outlook.com%252F%253Furl%253Dhttps%2a3A%2a2F%2a2Furldefense.com%2a2Fv3%2a2F__http%2a3A%2a2Fbvssystemsinc.com%2a2F__%2a3B%21%21B5cixuoO7ltTeg%21F2vnBf8jFbCIMGxunXjCuULCm5nmOipnJACm9JB3vRtzJ4CbQc5V2JF3OH7Vgp20nZOrM9KYKj4EZ8vSoLLbgehD%2a24%2526data%253D05%2a7C01%2a7Cjdenhardt%2a40stricklandfire.com%2a7C2129380d08804f1fd3e008db5242e1ae%2a7Cd658cbf30820420e8485ef2e373e8459%2a7C0%2a7C0%2a7C638194219452249732%2a7CUnknown%2a7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%2a3D%2a7C3000%2a7C%2a7C%2a7C%2526sdata%253DJkw7%2a2Fv0iHOD%2a2BxwAuYmSD7YMiAAGm8bDelOw1BUuMbnI%2a3D%2526reserved%253D0__%253BJSUlJSUlJSUlJSUlJSUlJSUlJSUlJSUlJSUlJQ%21%21B5cixuoO7ltTeg%21HiCuRAlm_f8hPDx_4h0wfAR2fNG3K8-6p5IX2VwYH7JupHpvt4E65t88GlZK7TRiJGojm3tX5QoabwjBUmIp1jUNXw%2524%26data%3d05%257C01%257Cjdenhardt%2540stricklandfire.com%257C3505a82b279142dcd6fd08db524564e2%257Cd658cbf30820420e8485ef2e373e8459%257C0%257C0%257C638194230232120314%257CUnknown%257CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%253D%257C3000%257C%257C%257C%26sdata%3dZq4Nr4Q4BIQ57jxd35JhqnZKSZHqr7NvjuElOPGle74%253D%26reserved%3d0&c=E,1,5AInHSLbQlT7n4sDjJl94Gils-2DygszP_MuYoVwxSy-5LkduI9HBVDgXKkW3bBxPz25o9IidEuq1USjhyGtU0ntaKh_6N0eKfSh9KVXwv-u0Q,,&typo=1> Phone: 704.896.9989 Fax: 704.896.1935 ________________________________ NOTICE - This communication may contain confidential and privileged information that is for the sole use of the intended recipient. 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