Garth, My point was that if they're there and hooking up to the FDC then they're there for a reason, fire or suspected fire. If for some reason water gets trapped on top of the clapper all that needs be done is open the IT to trip the valve. FDs don't reset but they leave an NOV to have your service company certify your system is correct. At least in these parts. In the final analysis though, I don't think that the FDC connects below the clapper for the reasons you proposed but rather to insure that the gasket on the FDC check valve stays wet. Of course my opinion is just that. The reason is lost in sprinkler mythology somewhere and it may be mine, yours or anything crazy thing.
On Mon, May 18, 2009 at 7:35 PM, Garth W. Warren <[email protected]> wrote: > Ron, I don't see it just for fun either, I believe it is in case of error, > not intentional harm. And I have never seen a Fire Department reset a DPV, > so having them there would solve what? > > Garth > ----- Original Message ----- > From: "Ron Greenman" <[email protected]> > To: <[email protected]> > Sent: Monday, May 18, 2009 9:52 PM > Subject: Re: FDC for Dry Pipe Systems > > > Garth, > > If the FD attaches to the system in any configuration the system will > be filled either by the FD itself (if above the DPV clapper) or the > pressure from the FD will trip the system (if the FDC is below the > clapper). In both cases the system will fill and if heads are open > they'll discharge at whatever pressure the FD wants (they have the > pump). And if the FD is there I really don't care if the alarm goes > off or not. I don't see anyone filling the system from the FDC just > for fun. > > On Mon, May 18, 2009 at 6:16 PM, Garth W. Warren <[email protected]> > wrote: >> If the Fire Department pressurizes the FDC - mistakenly - of a DPV that is >> not tripped the water will not flood the system piping it will be held >> back >> by the set DPV. If the FDC is connected above the DPV, the system can be >> filled with water without sounding an alarm and the system can be left in >> an >> inoperable wet state. >> >> Garth >> >> ----- Original Message ----- >> From: "A.P.Silva" <[email protected]> >> To: <[email protected]> >> Sent: Monday, May 18, 2009 8:25 PM >> Subject: RE: FDC for Dry Pipe Systems >> >> >>> Can you please expand? Pumping through the FDC? I'm not sure if I >>> understand. >>> >>> Tony >>> >>> -----Original Message----- >>> From: [email protected] >>> [mailto:[email protected]] On Behalf Of Garth W. >>> Warren >>> Sent: May 18, 2009 5:45 PM >>> To: [email protected] >>> Subject: Re: FDC for Dry Pipe Systems >>> >>> it is so that pumping will not flood the system if the valve is not >>> tripped >>> and so that closing of the control valve will not render the FDC >>> unusable.. >>> >>> Garth >>> >>> ----- Original Message ----- >>> From: "A.P.Silva" <[email protected]> >>> To: <[email protected]> >>> Sent: Monday, May 18, 2009 7:21 PM >>> Subject: FDC for Dry Pipe Systems >>> >>> >>>> The FDC is required to be connected between the main control valve and >>>> the >>>> dry pipe valve. I'v always thought this might be due to possible air >>>> leak >>>> from the FDC check valve, if it's connected on the dry side, downstream >>>> of >>>> the dry pipe valve. Is this the reason? >>>> >>>> For a project having a single dry system, the contractor has connected >>>> the >>>> FDC downstream of the DPV. The system seems to be holding. Any comments? >>>> >>>> Tony >>>> >>>> _______________________________________________ >>>> Sprinklerforum mailing list >>>> http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum >>>> For Technical Assistance, send an email to: >>>> [email protected] >>>> >>>> To Unsubscribe, send an email >>>> to:[email protected] >>>> (Put the word unsubscribe in the subject field) >>>> >>> >>> >>> _______________________________________________ >>> Sprinklerforum mailing list >>> http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum >>> For Technical Assistance, send an email to: [email protected] >>> >>> To Unsubscribe, send an email to:[email protected] >>> (Put the word unsubscribe in the subject field) >>> >>> _______________________________________________ >>> Sprinklerforum mailing list >>> http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum >>> For Technical Assistance, send an email to: [email protected] >>> >>> To Unsubscribe, send an email to:[email protected] >>> (Put the word unsubscribe in the subject field) >>> >> >> >> _______________________________________________ >> Sprinklerforum mailing list >> http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum >> For Technical Assistance, send an email to: [email protected] >> >> To Unsubscribe, send an email to:[email protected] >> (Put the word unsubscribe in the subject field) >> > > > > -- > Ron Greenman > at home.... > _______________________________________________ > Sprinklerforum mailing list > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email to:[email protected] > (Put the word unsubscribe in the subject field) > > > _______________________________________________ > Sprinklerforum mailing list > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email to:[email protected] > (Put the word unsubscribe in the subject field) > -- Ron Greenman at home.... _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
