Tire remanufacturer had bought an existing building in an existing industrial park. Existing pump met demand but on-site water storage tank did not satisfy duration requirements. Tank was manual fill. Underwriter required that tank be changed to auto fill and accepted the installation.
NFPA 20 says the break tank fill is to be automatic, but nothing about the main water storage tank. NFPA 24 talks about WHEN it's automatic do such and such......... "where a separate fill pipe is used, automatic filling shall be permitted"...but doesn't give any mandate about the fill having to be automatic. Sounds like and Underwriter/AHJ kind of decision. Craig L. Prahl, CET Fire Protection Specialist Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive PO Box 491, Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 [EMAIL PROTECTED] http://www.ch2m.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ed Kramer Sent: Wednesday, November 19, 2008 11:26 AM To: [email protected] Subject: RE: Storage tank fill line Thank you, George. Thanks, Ron. Ed > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:sprinklerforum- > [EMAIL PROTECTED] On Behalf Of George Church > Sent: Wednesday, November 19, 2008 6:38 AM > To: [email protected] > Subject: RE: Storage tank fill line > > Ed- > I'd agree that the choice is yours in #22. > > I don't have time to jump into #20, but it could be the auto part is > required is you're counting on a smaller than minimum design capacity > tank and the refill is counted as part of the duration- since > obviously that would have to be an auto fill. > > This isn't an opinion of the NFPA #22 Committee, just that of the > writer. > > George Church > Rowe Sprinkler > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Ed > Kramer > Sent: Wednesday, November 19, 2008 1:28 AM > To: [email protected] > Subject: Storage tank fill line > > Is an underground storage tank (designed per NFPA 22) required to have > an automatic fill line (as opposed to a manual fill line)? In this > case, the tank supplies a vertical turbine fire pump that supplies a > sprinkler system. > > > > Section 5.6.4.1 of NFPA 20 (07) says "A stored supply plus reliable > automatic refill shall be sufficient to meet the demand placed upon it > for the design duration." OK, but I'm not finding anything that says > the refill is required to be automatic. > > > > Jump to NFPA 22 (03). Section 13.4 addresses filling of the tank. > Section > 13.4.6 addresses filling of suction tanks and talks about where an > automatic fill line must connect to the tank, but doesn't say an > automatic fill is required. Section 13.4.1.4 says the control valve > on a bypass loop used to fill a tank shall be kept closed except when > the tank is being filled. > Sounds manual to me. > > > > So all this leads me to believe the fill line is allowed to be manual or > automatic (designer's choice). Or am I missing something? > > > > Ed Kramer > > Littleton, CO > > _______________________________________________ > 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:Sprinklerforum- > [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:Sprinklerforum- > [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)
