This is often my approach as well, if they’re a known unreasonable AHJ let the 
client fight the battle, if it’s worth fighting, their wallet will often go 
further whether they open it or not (big tax payer/developer of the area 
carries a lot of clout without spending a nickle), and if they go over 
someone’s head it’s not necessarily going to blow back on the contractor.

Mike Morey
CFPS 3229 • NICET S.E.T. 123677
Project Manager • Fire Protection Group
Shambaugh & Son, LP an EMCOR Company
7614 Opportunity Drive • Fort Wayne, IN • 46825
direct 260.487.7824 /  cell 260.417.0625 /  fax 260.487.7991
email [email protected]
[cid:[email protected]]

From: Brett Peters <[email protected]>
Sent: Tuesday, May 30, 2023 4:01 PM
To: Discussion list on issues relating to automatic fire sprinklers 
<[email protected]>
Subject: [Sprinklerforum] Re: CPVC Exposed

In these situations I always go back to the GC or building owner, project was 
bid to code and there was no disclosure of the AHJ’s requirements above (or 
different) than code, submit an extra and have the people that have to pay the 
bill go
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In these situations I always go back to the GC or building owner, project was 
bid to code and there was no disclosure of the AHJ’s requirements above (or 
different) than code, submit an extra and have the people that have to pay the 
bill go after the AHJ.
Sometimes when someone’s lawyer gets involved over additional costs they change 
their mind.
Other than that, not much you can do with someone who can’t be reasoned with

On Tue, May 30, 2023 at 1:52 PM Travis Mack 
<[email protected]<mailto:[email protected]>> wrote:
Good afternoon all.  I’m trying to help a contractor with an issue he is having 
with an AHJ.  I will say that this AHJ has been a challenge on many other 
projects. He has had informal interpretations from NFSA and AFSA about other 
issues and this AHJ just says they are all wrong and he is the only one that 
sees how the standard is correctly interpreted.  So, it is likely a mute point 
to push another issue with them, but:

Is it permissible to install exposed CPVC in a mechanical closet of ±40 sq ft?  
Light hazard, the piping can be installed exposed provided that certain 
criteria are met with sprinklers, spacing, etc.  The listings go on to state 
that CPVC can be installed in ordinary hazard compartments of otherwise light 
hazard buildings, etc..  This is just a weird project where it was much easier 
to put a pendent sprinkler 6” off the wall than get a sidewall in the room.  
The CPVC piping is exposed for about 6” going into the room.  This AHJ is 
having them rip it all out, cut out the drywall and drop down with a sidewall.  
I believe they were pinned high in the adjoining room and couldn’t readily drop 
down to get the sidewall minimum distance down from the ceiling, or something 
like that.


Travis Mack, SET
M.E.P.CAD |
181 N. Arroyo Grande Blvd. #105 I Henderson, NV 
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