Agreed. Nothing stating JP can't be sourced separately from FP. As long as the installation meets NFPA 20 and the FP can sense the drop in system pressure when the JP can't handle the flow requirement, you should be fine.
Craig L. Prahl Fire Protection Group Lead CH2MHILL Lockwood Greene 1500 International Drive Spartanburg, SC 29303 Direct - 864.599.4102 Fax - 864.599.8439 CH2MHILL Extension 74102 [email protected] -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Steve Leyton Sent: Wednesday, July 30, 2014 12:31 PM To: [email protected] Subject: RE: jockey pump suction There's nothing in the 20 that says you can't take suction from a different water supply for the jockey pump than the one that serves the fire pump. I'd say that the domestic supply should be reviewed by the AHJ to assure that it meets the sniff test for reliability, though that's not defined. Any way you look at it, the J-pump is required to be "approved". Steve Leyton Protection Design & Consulting Anticipating Simon Shannon's Out of Office Reply -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Todd - Work Sent: Wednesday, July 30, 2014 9:25 AM To: [email protected] Subject: jockey pump suction A client in a rural area has a diesel VT fire pump taking suction from an underground 30000 gallon cistern. Their domestic supply is fed from a separate well. The jockey pump takes suction from the domestic water supply. Is there a problem with this? There is a backflow preventer on the jockey pump suction line. Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT www.fpdc.com 860-535-2080 (ofc) _______________________________________________ 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 _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
