Just to follow up with this - after reviewing with the code inspector, it was 
the plumbing code requirement they were thinking of - not applicable to 
sprinklers. (I know you all have been on pins and needles!)


From: Matt Grise
Sent: Thursday, February 08, 2018 1:33 PM
To: 'sprinklerforum@lists.firesprinkler.org' 
Subject: threaded union fitting

I recently had an inspector say that all threaded union fittings must be 
accessible (access panel provided for union behind sheet rock). I have hear 
that this is a requirement for domestic water piping, but I have never heard 
about this for fire sprinklers. Does this ring a bell with anyone?



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