A check somewhere on the incoming fireline is necessary to keep from pumping back into the hydrant (the path back to the suction side being the path of least resistance with no intervening check valve) but it doesn't have to be on the riser per se.
On Tue, May 19, 2009 at 8:04 AM, Arthur Tiroly <[email protected]> wrote: > The connection from the FDC must be below the DPV and the connection tee > must be above a swing check in the riser in most every case. > > Arthur Tiroly > ATCO Fire Protection Design > Tiroly and Associates > 3300 King Ave > Cleveland, OH 44114 > 216-621-8899 > 216-570-7030 cell > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of A.P.Silva > Sent: Monday, May 18, 2009 7:21 PM > To: [email protected] > 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) > -- 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)
