If the tank is sized to supply full flow for the total duration I would agree. We frequently down size tanks by considering their replenish rate using automatic refill.
Ron Fletcher Aero Automatic Sprinkler Phoenix, AZ -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ed Kramer Sent: Tuesday, November 18, 2008 11:28 PM 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:[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)
