Thom wrote; I'm wondering how to approach the AHJ in requesting I remove and replace them with standard FDV's off the shelf.
Thom If there not needed provide the AHJ with a copy of the Meridian Plaza Fire Report. John Drucker - Mobile Email ----- Original Message ----- From: [email protected] <[email protected]> To: [email protected] <[email protected]>; Sprinklerforum <[email protected]> Sent: Mon Jul 08 01:03:02 2013 Subject: RE: Standpipe Design Question Those are mechanical restrictors that only operate on residual pressure. If system pressure doesn't exceed 175 psi, the prescriptive code says you don't need them, but it's a good idea to check with the responding fire dept. just to be sure they're okay with regular valves and the existing system pressures. My opinion only, etc. Steve L. -----Original Message----- From: [email protected] on behalf of Tom Duross Sent: Sun 7/7/2013 9:32 AM To: Sprinklerforum Subject: Standpipe Design Question Early post for the upcoming week. I have a system to test, circa late 70's installation. Class 3 (assumed), 2 ½" FDV's with 1 ½" reducers and caps. According to #25 the system should be tested to the appropriate standard it was installed under. This all make perfect sense, some digging is required on my end as to what (if any) edition of #14 was in place at the time of installation. My question is more towards the devices installed. The system has older FDV's cast saying Pressure Reducing Valve. They're the type with the locking clip on the handle stem that keeps the valve from being opened to a certain %. Most of us know these are no more Pressure Reducing Valves than a standard angle type hose valves available yesterday or today. There's 90 PSI at the top of the standpipe, gauge looks accurate, drops when petcock is closed and the gauge is loosened. Standpipe is 4" and runs up 8 stories. So I'm assuming around 140 PSI of the building's fire pump as system pressure there. Under 175 anyway. Pretty sure 140% was the FP rule then, so 90-65 would seem in the range of design. No drain risers btw. Because these valves are labeled as PRV's, I have to test everyone. Now, I do have to check for the applicable edition of #14 and also the applicable Building Code because they sometimes have specific verbage for standpipes that could trump #14. If I find no specific direction in either the Code or Standard requiring these, and I find for example the Code required 500@65 for a design; I'm wondering how to approach the AHJ in requesting I remove and replace them with standard FDV's off the shelf. Some are missing their pins, some the locking screws are gone too. Installing standard valves would save testing 8 floors of FDV's from now on, maybe improve outlet flow. Any thoughts. RIP GLC, Thomas Duross The Fire Pump Testing Company 11 Varney Street Jamaica Plain, MA 02130 T 617-971-0700 F 617-524-7171 C 617-592-4236 [email protected] _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org CONFIDENTIAL AND PROPRIETARY: This email message is intended only for the use of the individual or entity to which it is addressed and may contain information that is privileged and confidential, nor is it, unless specifically stated, intended to be relied upon by any person or persons other than the individual or entity named above and no warranties or representations are made or intended to persons or entities not named above. If the reader is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by telephone, return this message to the address above and delete all copies. Thank you. _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
