Jack, I think most would agree that a flat curve on a source producing 1500 gpm at a residual of 95 psi is to say the least acceptable, how far out in pressure do we hit 4,000 - 5,000 gpm, 77psi ?. Whats the most system demand with hose stream on a typical LH, OH1 even an OH2, 700 gpm perhaps ? If I had your water pressure the fire pump guys in town would be crying.
Its unfortunate in Joes case that a code official isnt willing to look at the big picture. John -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Thursday, July 31, 2008 9:31 PM To: [email protected] Subject: RE: Water Supply John Sometimes not that easy: This printer was allowed to tap into an 18" trunkmain, as that was the only reliable main within 1 mile. We started the flowtest with 250 gpm, then went to 500 gpm, 750 gpm, 1000 gpm, 1250 gpm, and hit 1500 gpm, (this was 125% of total demand for sprinklers and hoses) just to see a pressure drop, the pressure dropped from 98 psi to just 95 psi. The water utility said to drop the pressure by 25% we need to follow hell of a lot more, we may flood some streets and he would not allow this full-stop. Cheers Jack C Kilavuz Assistant Director Managing Consultant - RMS Royal & Sun Alliance Insurance - Singapore 77 Robinson Rd #17-00, Singapore 068896 DID: (+65) 6423 0552 Fax: (+65) 6423 0798 Mobile (+65) 9277 5741 Website: www.rsagroup.com.sg Note new e-mail address: [EMAIL PROTECTED] Please consider the environment before printing this e-mail! _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
