You're water district is required to supply 1000 gpm at 20 psi as a minimum. If this common irrigation supply comes off that supply you'd need to calc back to that tap, but with 13D systems off public systems you never need to worry about gpm availability being too low. It just gets to be a potential problem when you pressure demand takes you too close to the supply curve. A good thing to do is use a double needle gauge off a hose bibb for a few days, which will take one needle to the highest static, and then monitor the other needle for low static. Or you can use a recording gauge for a few days. Then plot your low static at 0 gpm to 20 psi at 1000 gpm. Stay 10% or better below that and you should be OK. Note that the you can't even plot flow demand as the required gpm is less than the width of your pencil line and so close to the Y axis you really can't read anything. Just end up with a demand reasonably less than low static and you're OK.
On Tue, Apr 2, 2013 at 12:21 PM, Bruce Verhei <[email protected]> wrote: > Sean > > I'd need to ask more questions. Is this supply connected to a separate > meter? If so, why is there a separate meter from the domestic? > > One local water district requires a landscape meter. This includes outside > fawcetts. They bill this water at a higher rate during the summer dry. They > also can shut off all outside water during dry years, and leave the homes > habitable. Their groundwater supply is marginal during drought. > Which goes to the second issue. From when 13-D first arrived on the scene > two reasons have always been given for using the domestic supply for the > spk supply. Cost. Reliability. > > The reliability position has always been that if the toilets can't flush > people won't stay in the house long. A shared supply has always been > considered more reliable for this reason. > People can easily live in a home forever with the irrigation turned off. > So the parties involved (design-build firm, owner, FP office), would need > to determine reliability is adequate. > > Bv > > > -----Original message----- > From: "Seidl Jamie D." <[email protected]> > To: "sprinklerforum@firesprinkler.**org <[email protected]>" > <sprinklerforum@firesprinkler.**org <[email protected]>> > Sent: Tue, Apr 2, 2013 15:22:10 GMT+00:00 > Subject: RE: Can a 13D system be connected to the U.G. irrigation supply ? > > I've never used a set up like this but start with the water supply chapter > in 13D. Talk to your local fire guy, he may be able to tell you in 5 > minutes what to do. Since it's been done already, don't re-invent the > wheel, learn by what's been done before, and design it better. You may have > to worry about sediment, and chemical compatibility due to run-off, > fertilizers etc... with the system material in the house, but that could be > checked by a testing lab, and including a strainer on the incoming line. > The irrigation system if it is using a tank, would most likely include a > pump, for which information should be available. You could test the pump > discharge, much like you would run a pump test on a fire pump. A system > like this would be an interesting challenge. You have the added plus of > not having to deal with the BFP, additional pressure loss, and cross > connection regulations. Jamie Seidl > > > -----Original Message----- > From: > sprinklerforum-bounces@**firesprinkler.org<[email protected]>[mailto: > sprinklerforum-**[email protected]<[email protected]>] > On Behalf Of Sean Lockyer > Sent: Tuesday, April 02, 2013 10:49 AM > To: 'sprinklerforum@firesprinkler.**org <[email protected]> > ' > Subject: Can a 13D system be connected to the U.G. irrigation supply ? > > Can a 13D system be connected to the irrigation supply in lieu of the > traditional U.G. arrangement of connecting at the domestic water meter ? I > have an unsprinkled house that I am being asked to sprinkle in the same > manner as the other sprinkled houses in the subdivision; these houses are > not connected to the U.G. at the water meter but are rather connected to a > curb stop that is reserved for irrigation water. The irrigation main does > not tie-back into the city water main so I have no way to gauge the water > supply by flowing and testing a hydrant. (These are single family residence > houses, not townhomes....) > > Is this even allowed ? I cannot find anything alluding to this and the AHJ > has never heard of anyone doing this before. I think the rationale behind > doing this was that it did not conflict with the potable water supply and > was considered to be "free" water. > > Can anyone shed any light on this and if so, what are the requirements and > where can they be found in 13D ? > > Sean Lockyer > Project Designer 4617 > Parkbreeze Court > Cell 386-279-1197 Orlando, > Florida 32808 > [email protected]<**mailto:slockyer@AITLifeSafety.** > com <[email protected]>> Phone: 407-816-9101 > > www.AITLifeSafety.com<http://**www.aitlifesafety.com/<http://www.aitlifesafety.com/>> > Fax: 407-816-9104 > [1] > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: <http://fireball.**firesprinkler.org/mailman/** > private/sprinklerforum/**attachments/20130402/cbf87d04/**attachment.html<http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20130402/cbf87d04/attachment.html> > > > > -------------- next part -------------- > A non-text attachment was scrubbed... > Name: image001.jpg > Type: image/jpeg > Size: 8903 bytes > Desc: image001.jpg > URL: <http://fireball.**firesprinkler.org/mailman/** > private/sprinklerforum/**attachments/20130402/cbf87d04/**attachment.jpg<http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20130402/cbf87d04/attachment.jpg> > > > > ______________________________**_________________ > Sprinklerforum mailing list > Sprinklerforum@firesprinkler.**org <[email protected]> > http://fireball.firesprinkler.**org/mailman/listinfo/**sprinklerforum<http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum> > ______________________________**_________________ > Sprinklerforum mailing list > Sprinklerforum@firesprinkler.**org <[email protected]> > http://fireball.firesprinkler.**org/mailman/listinfo/**sprinklerforum<http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum> > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: <http://fireball.**firesprinkler.org/mailman/** > private/sprinklerforum/**attachments/20130402/5b50564e/**attachment.html<http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20130402/5b50564e/attachment.html> > > > > ______________________________**_________________ > Sprinklerforum mailing list > Sprinklerforum@firesprinkler.**org <[email protected]> > http://fireball.firesprinkler.**org/mailman/listinfo/**sprinklerforum<http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum> > -- Ron Greenman Instructor Fire Protection Engineering Technology Bates Technical College 1101 So. Yakima Ave. Tacoma, WA 98405 [email protected] http://www.bates.ctc.edu/fireprotection/ 253.680.7346 253.576.9700 (cell) Member: ASEE, SFPE, ASCET, NFPA, AFSA, NFSA, AFAA, NIBS, WSAFM, WFC, WFSC They are happy men whose natures sort with their vocations. -Francis Bacon, essayist, philosopher, and statesman (1561-1626) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20130402/02e634e5/attachment.html> _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
