Fire pump is a 250 gpm at 60 psi 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 7, 2023 at 10:48 AM, <Tstone52 (mailto:[email protected])> wrote: > > > > > > Todd, > > > > > > > > According to NFPA 20, 2013 ed., 4.26, Table 4.26 shows 4” minimum suction. > > > > > > > > 2022 ED. Is the same. > > > > > > > > > Regards, > > > > G. Tim Stone > > > > > > > > G. Tim Stone Consulting, LLC > > > > NICET Level III Engineering Technician > > > > Fire Protection Sprinkler Design > > > > and Consulting Services > > > > > > > > 117 Old Stage Rd. - Essex Jct., VT. 05452 > > > > CELL: (802) 373-0638 > > > > [email protected] (mailto:[email protected]) > > > > > > > > > > > From: Fpdcdesign <[email protected]> > Sent: Saturday, October 7, 2023 10:16 AM > To: Discussion list on issues relating to automatic fire sprinklers > <[email protected]> > Subject: [Sprinklerforum] Distance to fire pump suction > > > > > > > > > > > I have a system with a 6” backflow preventer, which reduces to 4” immediately > after. There is approximately 48” of 4” pipe to the suction flange on a 4 x 3 > pump. All elbows are turning correctly. Is this sufficient? Does the 10x rule > apply to the size of the backflow preventer or the fitting directly attaching > to the pump? > > > > > > > > > > > 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] >
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