We have a water supply that is not capable of even delivering 1,500 at 20 psi on site. The required fire flow is actually 3,000 but we are working up an alternative means and methods proposal that will include my client paying the water district to upgrade about 600' of 6" AC to 8" C900. We've calculated the pressure gain (to the pound) and are running on-site demand calculations to compare what we have to what we need and what is projected to be available at the source node with the upgrades. The owner will be upgrading the fire sprinkler system and adding standpipes as part of the AMMR. On top of all of this, he's buying the parcel from the city in which it's located, so he's asking them to discount the purchase price to help amortize some of this cost. There are a LOT of fingers in this pie and we've estimated that there will be enough pressure gained to make the fire flow model work with... maybe 5 PSI to spare. With over a million bucks on the line, we want to be absolutely, positively, unequivocally, undoubtedly, unimpeachably certain that what we're proposing will work before anybody starts signing stuff.
SL -----Original Message----- From: BRUCE VERHEI [mailto:[email protected]] Sent: Monday, April 26, 2021 11:11 PM To: [email protected] Cc: Steve Leyton <[email protected]>; Bob Caputo <[email protected]> Subject: RE: Hydrant barrel loss In Puget Sound area it’s rare to find a dry hydrant with individually gated ports that isn’t as old as me. I’m curious to hear why it is necessary to calculate friction loss through the hydrant. Best. Bruce V. > On 04/26/2021 6:00 PM Steve Leyton via Sprinklerforum > <[email protected]> wrote: > > > Wet barrel hydrants have a messy valve assembly at each port. Dry barrels > are simple - water floods the barrel and exits any open port(s). I'm just > trying to be sure of whether there is any unusually high loss in the barrel > when flowing and while I'm at it, would like to verify the difference between > one port flowing and two or three. We need 20 PSI at the discharge side of > the port, so would like to include a fixed loss or just start the model at 23 > or 24 psi or whatever is required to address the loss in the hydrant. > > SL > > -----Original Message----- > From: Sprinklerforum > [mailto:[email protected]] On Behalf Of > Bob Caputo via Sprinklerforum > Sent: Monday, April 26, 2021 2:48 PM > To: [email protected] > Cc: Bob Caputo <[email protected]> > Subject: Re: Hydrant barrel loss > > Sincerely you’re measuring the flow and pressure at the hydrant in the first > place, why would you need to know that? Just curious... > > Reverse engineering the water supply in the water main below? > > > On Mon, Apr 26, 2021 at 3:57 PM Steve Leyton via Sprinklerforum < > [email protected]> wrote: > > > Does anyone have any tech data or knowledge of the pressure loss > > within a wet-barrel hydrant? I've tried to reach Mueller/Jones but > > their customer service isn't answering. > > > > > > Protection Design and Consulting > > Steve Leyton, President > > T | 619.255.8964 x 102 | www.protectiondesign.com< > > http://www.protectiondesign.com/> > > 2851 Camino Del Rio South | Suite 210 | San Diego, CA 92108 > > Fire Protection System Design | Consulting | Planning | Training > > > > > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprin > > kl > > er.org > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > er.org _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
