That’s funny.  I believe that statement has been in the standard since before 
flex drops were even available.  

 



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From: Sprinklerforum <[email protected]> On Behalf 
Of [email protected]
Sent: Thursday, November 15, 2018 3:01 PM
To: [email protected]
Subject: RE: system modification hydro test

 

Yes.  We were told that the only instance where isolated drops that numbered 
greater than 20 would not require hydrostatic testing at 200 psi was if they 
were existing flex drops that were relocated within the original radius of the 
flex drop and they weren't removed from the existing system.

 

Their position was that, despite the commentary in the handbook, and the 
engineers opinions from NFPA's interpretations, the intent of this code is only 
referring to relocated flex drops.


 

B.J. Newlin
Service Sales

Aegis Fire Protection LLC
[email protected] <mailto:[email protected]> 
P (913) 825-0343
F (913) 322-4475
C (913) 238-0035

"Have the courage to say no. Have the courage to face the truth. Do the right 
thing because it is right..."

- W. Clement Stone

 

 

 

-------- Original Message --------
Subject: system modification hydro test
From: Matt Grise <[email protected] <mailto:[email protected]> >
Date: Thu, November 15, 2018 2:47 pm
To: "[email protected] 
<mailto:[email protected]> "
<[email protected] 
<mailto:[email protected]> >

We had a situation where a TI modification involved adding  over 20 mechanical 
t’s to a system (office area layout change). NFPA 13 2013ed 25.2.1.6 says 
“modifications that cannot be isolated, such as relocated drops, shall not 
require testing in excess of system working pressure”

 

The mechanical t’s could not be isolated, but since they were added heads and 
not “…such as relocated drops…” the AHJ required us to test the entire existing 
floor at 200psi.

 

Has anyone seen this before?

 

Matt 

 


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