Supplemental? If 150 psi is pumped into the FDC the riser check will close making the FDC the only supply.
Ron Fletcher Aero Automatic Phoenix, AZ -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Thom McMahon Sent: Friday, July 18, 2008 7:45 AM To: [email protected] Subject: RE: FDC Connection I think it's important to remember that the FDC is "supplemental" to the supply, not "Equal" to a supply. I feel that the 4" tied to the 2-1/2" MAIN meets the intent of the standard. It does not need to be 4" all the way from the riser to the FDC, when the FDC is remote from the riser and connects to a MAIN. Thom McMahon, SET Firetech, Inc. 2560 Copper Ridge Dr P.O. Box 882136 Steamboat Springs, CO 80488 Tel: 970-879-7952 Fax: 970-879-7926 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Garth W. Warren Sent: Friday, July 18, 2008 9:38 AM To: [email protected] Subject: Re: FDC Connection it should be 4" from the connection to the main and then connected through a 21/2x21/2x4 tee. I disagree that NFPA allows for connection anywhere on the system, it states "provided the pipe size meets the requirements of 8.17.2.3." Otherwise "creative" companies would have 1" fdc piping connected to the end of a line. Garth ----- Original Message ----- From: "Brian Harris" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Friday, July 18, 2008 9:02 AM Subject: RE: FDC Connection > The FDC is actually remote from the riser & ties into a 2-1/2" floating > main. I think it should at least be 4" all the way to the back main and then > reduce it there.... > > > Brian Harris > FDFP INC. > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of > [EMAIL PROTECTED] > Sent: Friday, July 18, 2008 8:48 AM > To: [email protected] > Subject: Re: FDC Connection > > NFPA 13, 2007, section 8.17.2.3, (3) - For hydraulically calculated systems, > the fire department connection shall be permitted to be less than > 4 in. and no less than the size of the system riser, where serving one > system riser. > > My opinion is that the pipe from the FDC itself to the riser needs to be 4" > minimum. Based on your description I would interpret that as saying that > the 2 1/2" pipe on the FDC is not permitted as the riser is 4" and I am > assuming the 2 1/2" reduction is between the FDC and the riser. > > My opinion only. > > Andrew Weisfield > > > > > "Brian Harris" <[EMAIL PROTECTED]> Sent by: > [EMAIL PROTECTED] > 07/18/2008 08:36 AM > Please respond to > [email protected] > > > To > <[email protected]> > cc > > Subject > FDC Connection > > > > > > > Forum, > Quick FDC connection, I just saw on some drawings that came in that the > FDC > is 4" with a 4" check valve and then reduced down to 2-1/2" with a > reducing > coupling. The system riser is 4", can you choke it down like that? > Technically the FDC is the same size as the riser but where do you draw > the > line? I'm not liking it, what say you??? > > > Regards, > > > <http://www.firstdefensefire.com/> > > > > > > > > > E-mail message checked by Spyware Doctor (6.0.0.354) > Database version: 5.10290e > http://www.pctools.com/en/spyware-doctor-antivirus/ > _______________________________________________ > 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) > > > > This email is intended for named recipients only. > _______________________________________________ > 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) > > > > > > E-mail message checked by Spyware Doctor (6.0.0.354) > Database version: 5.10290e > http://www.pctools.com/en/spyware-doctor-antivirus/ > > > > > > E-mail message checked by Spyware Doctor (6.0.0.354) > Database version: 5.10290e > http://www.pctools.com/en/spyware-doctor-antivirus/ > _______________________________________________ > 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) No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.138 / Virus Database: 270.5.1/1559 - Release Date: 7/17/2008 6:08 PM _______________________________________________ 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)
