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)
