2014 NFPA 25 14.3.1 (12) requires an obstruction investigation, it isn’t a maybe, it is a shall.
Scott Office: (763) 425-1001 x 202 Cell: (612) 759-5556 From: Sprinklerforum [mailto:[email protected]] On Behalf Of Forest Wilson Sent: Wednesday, July 06, 2016 10:30 AM To: [email protected]; [email protected] Subject: Re: Sodium Silicate I encountered a similar situation a few years ago. I would send a letter to the ahj and owner explaining what you found and notify them the system may be impaired. Suggest lab testing to confirm if needed and then ask the ahj for guidance. On Jun 16, 2016 8:21 PM, "Jeff Bridges" <[email protected]<mailto:[email protected]>> wrote: We found some- actually quite a bit, of sodium silicate, in the FDC drop above the check valve (about 3” thick 4” diameter). The FDC is located off the end of the feed main side of a gridded system. This is after doing a 100 head TI where we didn’t see anything unusual from the branch piping. NFPA 25 Annex D.5 directs a flushing of the entire system. Am I correct? Jeff Bridges _______________________________________________ Sprinklerforum mailing list [email protected]<mailto:[email protected]> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
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