I was referring to the part that says "no less than the size of system riser, where serving one system riser." and "For multiple system risers supplied by a manifold, the fire department connection need not be larger than that for an individual system." On 11/25/2014 10:25 AM, Tim Stone wrote: > NFPA 13 is a minimum design /installation Standard, NOT A CODE. > > Fire department Pump Trucks are equipped with variable pressure pumps which > enables the pump operator to increase extra boost when needed. > I don't see any contradiction. > > Regards, > G. Tim Stone > > G. Tim Stone Consulting, LLC > NICET Level III Engineering Technician > Fire Protection Sprinkler Design > and Consulting Services > > 117 Old Stage Rd. - Essex Jct., VT. 05452 > CELL: (802) 373-0638 TEL: (802) 434-2968 Fax: (802) 434-4343 > [email protected] > > -----Original Message----- > From: Sprinklerforum [mailto:[email protected]] > On Behalf Of Cory Power > Sent: Tuesday, November 25, 2014 8:39 AM > To: [email protected] > Subject: Contradiction if FDC codes? NFPA 13 2013 > > Could someone explain to me the intent behind this code and if the Annex is > contradicting? > > 8.17.2* Fire Department Connections. > > 8.17.2.3* Size. The size of the pipe for the fire department connection > shall be in accordance with one of the following: > > (3) For hydraulically calculated systems, the fire department connection > shall be permitted to be less than 4 in. > (100 mm) and no less than the size of system riser, where serving one system > riser. > > A.8.17.2.3 The purpose of a fire department connection is to supplement the > pressure to an automatic fire sprinkler system. > It is not the intent to size the fire department connection piping based on > system demand. For multiple system risers supplied by a manifold, the fire > department connection need not be larger than that for an individual system. > > --- > This email has been checked for viruses by Avast antivirus software. > http://www.avast.com > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
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