Yes, hand calc would be required. I have an excel sheet that does this. Bob Knight, CET III 208-318-3057 www.firebyknight.com
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Sean Lockyer Sent: Tuesday, April 02, 2013 12:20 PM To: '[email protected]' Subject: RE: Can a 13D system be connected to the U.G. irrigation supply ? Thanks Steve, using the base pressure as a baseline with the residual being 10% lower is a good rule of thumb but how do you figure the GPM in that event ? Also, Bob-I have re-read section 8.4.4 and it appears as though the only way to do this is by doing hand calculations as per the calculation sheets it appears; would you agree with that assessment ? Forgive my ignorance all, I have never been presented with a system connection such as this but as Mr. Spock would say, "For everything there is a first time." Sean Lockyer Project Designer 4617 Parkbreeze Court Cell 386-279-1197 Orlando, Florida 32808 [email protected]<mailto:[email protected]> Phone: 407-816-9101 www.AITLifeSafety.com<http://www.aitlifesafety.com/> Fax: 407-816-9104 [1] From: Sean Lockyer Sent: Tuesday, April 02, 2013 10:48 AM To: '[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:[email protected]> Phone: 407-816-9101 www.AITLifeSafety.com<http://www.aitlifesafety.com/> Fax: 407-816-9104 _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
