You say that, but we've had a fire marshal in the past try and require a control valve and drain on every branch line in a retail building, so you could isolate only the area requiring work.
> > On Feb 2, 2018 at 3:12 PM, <Steve Leyton > (mailto:[email protected])> wrote: > > > > > > Why not proposed valves every 50’ or so to be sure that you can isolate down > to the smallest section(s) of pipe for potential interruptions? (SMH) > > > > > > > > If the intent is to work on the feed pipe then how far down the line would > you have to put the FDC to arrange it so it wouldn’t be interrupted? > Seems to me the AHJ is wishfully trying to design for a scenario that has an > infinitesimal chance of occurring in the first place and that can’t be > “pumped around” in any case. Because such as scenario isn’t reasonably > foreseeable, the standard (14) is mute in that regard. > > > > > > > > SL > > > > > > > > > > > > > > > > > > > > > > From: Sprinklerforum > [mailto:[email protected]] On Behalf Of > Dewayne Martinez > Sent: Friday, February 02, 2018 11:42 AM > To: [email protected] > Subject: RE: FDC & Pump > > > > > > > > > > No, > > > > I have had to put an extra control valve for the standpipe feed at point of > connection to the riser manifold in addition to the standpipe isolation > valves. The AHJ’s reasoning was that if work was required on the feed pipe > it could be isolated and wouldn’t affect the other systems on the manifold. > > > > > > > > > Thank you, > > > > Dewayne Martinez > > > > Fire Protection Design Manager > > > > > > > > TOTALMechanical > > > > BuildingIntegrity > > > > > W234 N2830 Paul Rd. > Pewaukee, WI 53072 > > > > [email protected] (mailto:[email protected]) > > > > Ph: 262-522-7110 > > > > Cell: 414-406-5208 > > > > http://www.total-mechanical.com/ > > > > > > > > > > > > > > > From: Sprinklerforum > [mailto:[email protected]] On Behalf Of Steve > Leyton > Sent: Friday, February 02, 2018 9:39 AM > To: [email protected] > (mailto:[email protected]) > Subject: RE: FDC & Pump > > > > > > > > > > What valve are you referring to as “standpipe feed” control? Are you > talking about the isolation valves required in 6.3.2? If that’s the > valve you’re referring to, then no you do not have to pump downstream of that > (those) valve(s). > > > > > > > > The foregoing is my opinion only and is not intended to represent the NFPA > 14 Technical Committee, nor serve as an interpretation of the standard. > > > > > > > > SL > > > > > > > > > > From: Sprinklerforum > [mailto:[email protected]] On Behalf Of > Dewayne Martinez > Sent: Friday, February 02, 2018 4:29 AM > To: [email protected] > (mailto:[email protected]) > Subject: RE: FDC & Pump > > > > > > > > > > Tom, > > > > Are you saying that if I put a control valve for the standpipe feed at the > riser manifold and the FDC is connected to the riser manifold that I must > also connect the FDC downstream of the standpipe feed control valve? Is > that in 14? I have had a couple of AHJ’s make me put a control valve in > over the years and I didn’t know it was wrong. I thought it was just like > the individual system control valves on the manifold. > > > > > Thank you, > > > > Dewayne Martinez > > > > Fire Protection Design Manager > > > > > > > > TOTALMechanical > > > > BuildingIntegrity > > > > > W234 N2830 Paul Rd. > Pewaukee, WI 53072 > > > > [email protected] (mailto:[email protected]) > > > > Ph: 262-522-7110 > > > > Cell: 414-406-5208 > > > > http://www.total-mechanical.com/ > > > > > > > > > > > > > > > From: Sprinklerforum > [mailto:[email protected]] On Behalf Of Tom > Duross > Sent: Wednesday, January 31, 2018 4:36 PM > To: [email protected] > (mailto:[email protected]) > Subject: RE: FDC & Pump > > > > > > > > > > What Larry said.. > > > > And there can’t be any valves between the FDC and the FDV’s on the standpipe > unless you have more than one standpipe and have isolation valves at the base > of each standpipe so you can’t take them off the riser manifold, for example. > > > > TD > > > > > > > > > > > > The requirement is from NFPA 13, not from NFPA 20. Here is the text from NFPA > 13-2013: > > > > > > > > 8.17.2.4.8 Fire department connections shall not be connected on the > suction side of fire pumps. > > > > > > > > Larry Keeping > > > > > > > > > > > > > > > > I have always installed FDC's on the discharge side of fire pumps. Looking > through 2013 NFPA 20, I don't see anything precluding the instillation on > the supply side. Is the FDC allowed to be installed on the supply? > > > > > > I have a contractor that has installed the FDC on the supply run-in, instead > of stubing up a secondary line from the remote FDC. > > > > > > Thanks, > > > > > > Jamie > > > > > > > _______________________________________________ Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org >
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