Don't forget about backflow prevention requirements. If filling a FW tank from a potable source, put backflow prevention (1 ft air gap) above the overflow level as allowed per IPC. Whether the fill line is automatic or manual, that float- or manual fill valve must be appropriately freeze-protected. Then place this fill line in an appropriately heated enclosure (likely the heated pump house adjacent to the tank) and run the pipe up inside the tank, as previously indicated, with freeze protection on any exposed piping not in a heated doghouse extension between the enclosure and the storage tank shell.
Ryan L. Hinson, PE*, SET** \ Burns & McDonnell Associate Fire Protection Engineer O 612-900-3755 \ M 763-688-4045 \ F 952-229-2923 [email protected]<mailto:[email protected]> \ burnsmcd.com<http://www.burnsmcd.com/> 8201 Norman Center Drive, Suite 500 \ Minneapolis-St. Paul, MN 55437 *Registered in: AK, LA, MD, MN, PA, TX, & UT **NICET IV - Water-Based Systems Layout From: Brian Harris <[email protected]> Sent: Tuesday, July 11, 2023 4:20 PM To: Discussion list on issues relating to automatic fire sprinklers <[email protected]> Subject: [Sprinklerforum] Re: Storage Tank Thank you. Brian Harris, CET BVS Systems Inc. bvssytemsinc.com<http://bvssystemsinc.com/> From: August Hoffman <[email protected]<mailto:[email protected]>> Sent: Tuesday, July 11, 2023 4:57 PM To: Discussion list on issues relating to automatic fire sprinklers <[email protected]<mailto:[email protected]>> Subject: [Sprinklerforum] Re: Storage Tank Really depends on the tank, I have seen ones that fill from the top, some fill from the side, but I don't think I have seen above ground tanks that fill from the bottom (but they may very well exist). For the exposed pipe it will most likely need to be insulated (or heat traced) unless they plan on building a heated space around the tank. If it is an existing tank, you might be able to get cut sheets from the manufacturer if you can get a model number somewhere on the tank. If it is a new tank, then it should be easier to find cut sheets from whoever ordered it/ is installing it. Most larger tanks I have seen are top fed. AUGUST HOFFMAN CET From: Brian Harris <[email protected]<mailto:[email protected]>> Sent: Tuesday, July 11, 2023 12:43 PM To: [email protected]<mailto:[email protected]> Subject: [Sprinklerforum] Storage Tank Might be a silly question but when using a storage tank for a pump where is the tank fill located? Top, Bottom, Side, etc. This is in an area where it does get cold enough to freeze so I'm wondering if it can be filled from under the tank. The city supply psi will overcome the head pressure in the tank so technically it would work. Brian Harris, CET BVS Systems Inc. bvssystemsinc.com<https://linkprotect.cudasvc.com/url?a=http%3a%2f%2fbvssystemsinc.com%2f&c=E,1,Cl5jNux_4aHTA_lshMw_BP4vubRWsbj6FRso6_Qea6w5B6fQtU3pylLFqcjsULXq1yQPrWn56LJBtTGw1lNC_tt_VE2_TEvVs0-n525WGudQ6ElWpY0LYukesjor&typo=1> Phone: 704.896.9989 Fax: 704.896.1935
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