I think he meant that the pressure should drop if water flows from the pressure
relief valve, while he is manually opening it. Yes, the pressure should drop at
least a little bit when you are discharging water.
With pressures that high, I assume this is a system with a fire pump and jockey
pump
Thanks. I stopped looking in the 1991 edition and apparently that table was
added in the 1994 edition, right before they stepped making the stuff.
Todd G Williams, PE
Fire Protection Design/Consulting
Stonington, CT
860-535-2080 (tel:860-535-2080) (ofc)
860-554-7054 (tel:86
Todd,
My 2002 copies of 13 and 13R have it as an option under specially listed pipe,
NFPA 13- section: 6.3.6.1, and NFPA 13R-section: 5.2.2.2.
Hope this helps!
Sincerely,
Eric Rieve, SET
Rieve Fire Protection
From: Fpdcdesign
Sent: Monday, March 4, 2024 10:36 AM
To: Sprinklerforum
Subject: [
Was polybutylene pipe ever listed for NFPA 13 or 13R systems? I looked at a
system with PB pipe this morning but have no other information on the system
(placard only had the static water pressure).
Todd G Williams, PE
Fire Protection Design/Consulting
Stonington, CT
860-53
