I was told that the pump was installed in the 1980s. The 8” underground was reduced to 6” inside the building and that went to the pump suction. At some point, someone added a 6” RPZ in the suction line of the pump and it hasn’t tested properly since.
I was hired to design the replacement pump. I convinced them to replace the 6” mess with an 8” double check and the proper 8” suction line first. The test is very close to being adequate, except for a few questions. This being one of them. 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) > > On Oct 15, 2025 at 4:13 PM, <Tom Wellen (mailto:[email protected])> wrote: > > > > > Steve, > > > > Yes, the fire pump data plate. > > > > Tom Wellen > > Procon Consulting > > > > > On Wed, Oct 15, 2025 at 3:09 PM Steve Leyton <[email protected] > (mailto:[email protected])> wrote: > > > > > > > > > > > > > Does anyone have the original factory bench test curve (or the OEM spec > > from the time of installation) for comparison? > > > > > > > > > > > > > > > > Steve > > > > > > > > > > > > > > > > > > > > From: Fpdcdesign <[email protected] (mailto:[email protected])> > > Sent: Wednesday, October 15, 2025 12:50 PM > > To: Sprinklerforum <[email protected] > > (mailto:[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 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) > > > > > > > > > > > > > > > > _________________________________________________________ > > SprinklerForum mailing list: > > > > https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org > > To unsubscribe send an email to > > [email protected] > > (mailto:[email protected]) > > _________________________________________________________ SprinklerForum > > mailing list: > > https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org > > To unsubscribe send an email to > > [email protected]
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