But what if the underground is a loop and has section valves plus the riser valves? The Phoenix Fire Dept. makes us put a FDC on each manifold instead of at the fire pump. The pump supplies the underground loop for the entire building with multiple lead ins. There are sectional gate valves in the loop, there is a gate valve in each underground leadin, and there are gate valves in each riser on a manifold. Phoenix says we can't have any gate valves between the FDC and the "system" gate valves. They read 8.17.2.4.3 and stop there. As far as the PFD is concerned 8.17.2.4.4 doesn't apply.
What do you guys think? Can there be multiple gate valves between the FDC and sprinkler systems? Ron F -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Charles Thurston Sent: Thursday, July 11, 2013 3:27 PM To: [email protected] Subject: Re: FDC Arrangement Hello All, I tend to use these for these situations 8.17.2.4.4 is the key to them. 8.17.2.4.2 For single systems, the fire department connection shall be installed as follows: (1) Wet system - on the system side of system control, check, and alarm valves (see Figure A.8.16.1.1) (2) Dry system - between the system control valve and the dry pipe valve (3) Preaction system - between the preaction valve and the check valve on the system side of the preaction valve (4) Deluge system - on the system side of the deluge valve 8.17.2.4.3 For multiple systems, the fire department connection shall be connected between the supply control valves and the system control valves. 8.17.2.4.4* The requirements of 8.17.2.4.2 and 8.17.2.4.3 shall not apply where the fire department connection is connected to the underground piping. -- Best regards, Charles mailto:[email protected] _______________________________________________ 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
