Sorry for the mix-up, I was referring to the pressure tanks as the stored 'volume'. The well's pump has enough psi but only about 1/2 the required gpm rating - so by itself it's inadequate. The owner has several pressure tanks totaling in the 300 gallon range. So the stored volume is there.
The way I'm seeing this, someone correct me if I'm wrong, NFPA's formula for pressure tanks (assuming 2/3 proportion of air/water) would mean 75 psi air is needed for a 45 psi sprinkler working pressure. On Mon, Apr 25, 2011 at 1:21 PM, Mike Cabral <[email protected]>wrote: > The handbook is just that commentary. Adding a series of pressure > tanks will not > increase volume. You only get out what the well pump pushes out. > Mike Cabral > Cell 314-412-1800 > E-Fax 636-438-1338 > > > > > ________________________________ > From: IPA <[email protected]> > To: [email protected] > Sent: Mon, April 25, 2011 3:09:35 PM > Subject: Re: 13D Pressure Tanks > > Pressure coming from 60 psi submersible well pump - volume coming from > several pressure tanks in series. 10 minutes would be met. > > > On Mon, Apr 25, 2011 at 12:46 PM, Mike Cabral <[email protected] > >wrote: > > > 2007 13D 5.1.1 "Tanks, expansion tanks, pumps . . . shall not be required > > to be > > listed. You would however, need to meet the plumbing code requirements > for > > the > > tank. NSF listed if tied into the domestic. Question where is the > pressure > > and > > volume coming from? Will the well pump be able to meet the sprinkler > demand > > for > > the 10 min requirement? > > > > > > > > Mike Cabral > > Cell 314-412-1800 > > E-Fax 636-438-1338 > > > > > > > > > > ________________________________ > > From: IPA <[email protected]> > > To: [email protected] > > Sent: Mon, April 25, 2011 12:35:44 PM > > Subject: 13D Pressure Tanks > > > > Question about 13D & pressure tanks: > > > > 1.) I have a 13D system where the owner would like to go with a well and > > pressure tank installation for their sprinkler & domestic water. The 13D > > Handbook (2007) states that NFPA 13 should be consulted for info > regarding > > the pressure tanks. Okay, so NFPA #13 says, among other things, that > > "Pressure tanks shall not be used to supply other than sprinklers and > hand > > hose attached to sprinkler piping." Doesn't this rule them out for a > > combined domestic/sprinkler application? > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > > > For Technical Assistance, send an email to: [email protected] > > > > To Unsubscribe, send an email > to:[email protected] > > (Put the word unsubscribe in the subject field) > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > > > For Technical Assistance, send an email to: [email protected] > > > > To Unsubscribe, send an email > to:[email protected] > > (Put the word unsubscribe in the subject field) > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email to:[email protected] > (Put the word unsubscribe in the subject field) > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email to:[email protected] > (Put the word unsubscribe in the subject field) > _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
