In 13, 2002 ed, A.8.15.1.1 shows some example riser including combinations like you have.
Craig L. Prahl, CET Fire Protection Group Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive PO Box 491, Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 [EMAIL PROTECTED] http://www.lg.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Haugen, Charles Sent: Wednesday, March 28, 2007 2:47 PM To: [email protected] Subject: Riser Schematic vs. Installation Practices... (sorry if doubledup...) Forum, *envision if you will...* Underground piping enters building - sprinkler point of connection is 'typically' @ 1'-0" a.f.f. at which we provide a gate valve - backflow assembly (or similar) - gate valve; then we proceed to our system. Next, envision a dual system - (1) wet and (1) dry... After the gate - a tee which branches off en route to the dry system... include a gate valve - dry pipe valve- piping to system. Off the tee outlet we go to the wet system... gate / b'fly valve - riser manifold - piping to system. Question: can this valve (whether a gate of b'fly) be omitted? I've seen it installed both ways - arguing that the gate on the discharge side of the B.F.P. and the Gate on the suction of the Dry can both be closed to isolate work on the Wet - if and when needed. I have been on both sides of the argument... dependent on the job / zones / etc... I've searched through NFPA 13 and cannot locate a specific code or installation practice that lays this to rest. Anybody else? Much Appreciation in advance. Chuck H. *go Twins* _______________________________________________ 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) _______________________________________________ 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)
