Brad, If this tank sits in a place with municipal water, but still needs a tank, I would say you need to design for 8-hrs.
Start of what if's... ...What if water department will only allow a rate of fill that is 12-hours. Document well (no pun), and fill tank in twelve. ...What if you are truly in the sticks, and you only have, and can only get, a 20 gpm well. I think some sort of minimal tank for back up, or rent temporary tank system during major schedule maintenance, and live within your means. Of course, restrict activites during this time. While you tank is down is not the time for hot work to support new equipment. bv From: "Brad Casterline" <[email protected]> To: [email protected] Sent: Thursday, May 16, 2013 11:42:59 AM Subject: RE: NFPA 22 2013 Water storage re-fill time. ok good, now then, if you are/were an A.H.J., how would you answer this question: "How much time do we get to be able to re-fill a water storage tank in 8 hours"? for example, 150,000 gallon capacity for demand*duration, say tank A, from which the pump takes suction. Now we build a twin tank B, and connect to tank A with 8" pipe with a shut-off valve normally closed. There is an event and tank A runs dry. We open the shut-off valve and tank A is re-filled in about 18 minutes. The well pump then starts refilling tank B, which will take 3 days. So the question is "how much time do we get to be able to re-fill the tank within in 8 hours?". -----Original Message----- From: Brad Casterline [mailto:[email protected]] Sent: Thursday, May 16, 2013 8:18 AM To: [email protected] Subject: NFPA 22 2013 Water storage re-fill time. asking for a co-worker: 1) Why are water storage tanks required to be re-filled in 8 hours? 2) Would the requirement apply to ponds (man-made with liner in this case)? 3) Are there any alternatives to the requirement? (the pond is large and filled by a well pump with a pumping rate that would take more than 8 hours) many thanks, Brad Casterline, NICET IV Fire Protection Division FSC, Inc. P: 913-722-3473 [email protected] www.fsc-inc.com Engineering Solutions for the Built Environment _______________________________________________ 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 _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
