Would the impairment be that there is not a ‘listed’ antifreeze solution to use for replacement?
Cliff Whitfield, SET President Fire Design, Inc. 184 Comfort Place Burnsville, NC 28714 Ph: 828-284-4772 <mailto:[email protected]> [email protected] <http://www.fire-design.com/> www.fire-design.com From: Sprinklerforum <[email protected]> On Behalf Of Fpdcdesign Sent: Thursday, March 29, 2018 8:01 AM To: Sprinklerforum <[email protected]> Subject: Re: Antifreeze Solution and NFPA 25 If you replaced the solutions with one that was rated for and tests at -15degF, what would be the impairment? Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT 860-535-2080 (ofc) 860-553-3553 (fax) 860-608-4559 (cell) On Mar 29, 2018 at 7:42 AM, <Danette <mailto:[email protected]> > wrote: We have several CPVC antifreeze systems that we've checked with a hydrometer to see the condition of the solution. The ranges are from a +25 to a -10 deg. F. NFPA 13 (2010) states in Figure A.10.5.1 that the lowest one-day mean temperature is 0 degrees for our location in sunny Texas. The manufacturer of a solution we often use (Noble Co.) indicates their product, GL-48, is rated at -15 degrees F. but we have no way to know what brand or rating the solution might be in these systems we've tested. The local fire marshal has instructed me that all of the systems are considered "impaired" because the solution differs from the antifreeze listing temperature (of at least the product we typically use). It is my belief if we were to change the solution in any or all of the systems, by nightfall due to various factors including ambient temperature change, any or all of the systems could be back in "impairment" mode by his standards. With my computer in the shop, I have little access to research this topic. Can you offer me code to follow or wisdom and experience on this subject? Thank you. _______________________________________________ Sprinklerforum mailing list [email protected] <mailto:[email protected]> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus
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