Yes, this is a 400 gpm vertical inline. The horizontal pump tends to to follow the 250 gpm increments but vertical inlines can go every 50 or 100. 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 6, 2025 at 5:32 PM, <Bob Caputo (mailto:[email protected])> > wrote: > > > > Are you sure you have a fire pump rated at 400 gpm? Listed fire pumps come > in 250, 500, 750 etc gpm. Not 400 gpm. That aside, perhaps adding a > water storage tank will solve the problem? > > > > > > > > > > > > > > > Bob Caputo, CFPS > > > > President > > > > > American Fire Sprinkler Association > > > > > p: > > 214-349-5965 ext124 > > > > w: > > firesprinkler.org (http://firesprinkler.org/) > > > > > > > > > > > Train a safer, more efficient workforce. > > > > By enrolling your employees in the AFSA Apprenticeship Training Series for > Sprinkler Fitters > (https://www.firesprinkler.org/WWW/Education/Apprentice_Training/WWW/Education/Apprenticeship_Training.aspx?hkey=e88ef09e-d74c-407f-abcd-995aff866149), > you will reap the benefits of a qualified, professional installation crew. > Well-trained employees will work smarter, increasing your company's > productivity and, in turn, its profits. Learn more > (https://www.firesprinkler.org/WWW/Education/Apprentice_Training/WWW/Education/Apprenticeship_Training.aspx?hkey=e88ef09e-d74c-407f-abcd-995aff866149). > > > > > > > > > > > > > On Mon, Oct 6, 2025 at 11:23 AM Fpdcdesign <[email protected] > (mailto:[email protected])> wrote: > > > > > > > > > > > Kyle, As I mentioned, there are several issues with this site I didn’t > > mention. One is approximately 1000 ft of 80 year old, severely tuberculated > > 8” main (estimate C=30) that feeds the site. The first thing is that this > > needs to be replaced. Once that is done, the 825 is very possible. > > > > > > > > CW, I have all of that info. I have been working on this since 2021 and it > > just came back to life after a year away. 825 gpm is the sprinkler demand > > only. There is a raw water supply that would be used for hose streams. > > > > > > > > I hesitate to post many specifics of the project here as what is going on > > could result in litigation. > > > > > > > > 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 6, 2025 at 11:26 AM, <Kyle.Montgomery > > > (mailto:[email protected])> wrote: > > > > > > > > > > > > > > > > > > “Neither pump has ever passed its initial test due to the water supply”. > > > So, the water supply can’t even provide 600 GPM to the little pump? If > > > that’s the case, there is no workaround other than adding a water tank. > > > You can commission the pump without reaching 150% of the rated capacity, > > > but you have to at least meet the demand flow and pressure. If you can’t > > > get to 600 GPM, you certainly aren’t getting to 825 GPM. > > > > > > > > > > > > > > > > > > > > > > > > -Kyle M at Aero > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > From: Fpdcdesign <[email protected] (mailto:[email protected])> > > > Sent: Monday, October 6, 2025 7:24 AM > > > To: Sprinklerforum <[email protected] > > > (mailto:[email protected])> > > > Subject: [External][Sprinklerforum] Multiple undersized pumps. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > I am working on a project for a facility with several small and medium > > > sized buildings. Only some of the buildings are sprinklered. This > > > location has a plethora of problems but I only have one that i will bring > > > here. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > The facility has a very bad water supply and a new building was > > > constructed, complete with fire pump, to meet a demand of 825 gpm. Also > > > on this site is a fire pump house with a 400 gpm at 75 psi pump that > > > takes suction from the main. I was told this pump only feeds a dedicated > > > main to 3 buildings. However, I subsequently found that the pump actually > > > ties into the underground feeding the entire site, including the new > > > building. Now I have a main fed by a pump with a maximum flow of 600 gpm > > > feeding a 750 gpm pump. Is there any way to get this to work? There is no > > > by-pass around the 400 gpm pump. Not sure if that would make a > > > difference. I would appreciate input from those mightier than I. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Neither pump has ever passed its initial test due to the water supply. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > 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] > > (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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