I can't disagree with John (Hi John) but we need more info to make the call, In remote area? Fire pump? What is safety margin on existing? What is friction loss on the flex?
Just because you add 4 flex piping to an existing system does not require it to be calculated. But does need to be evaluated. Richard Carr, SET Branch Manager Cox Fire Protection, Inc 6555 Grace Lane. Jacksonville, Fl. 32205 rc...@coxfire.com 904-781-8227 From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of John Irwin Sent: Tuesday, August 30, 2016 7:14 AM To: sprinklerforum@lists.firesprinkler.org Subject: RE: Flexheads in small renovation I disagree with Richard. (Hi Richard!) Relocating these sprinklers with flex heads may very well change the location of the most hydraulically remote area to the place you are working. Flex-heads come with a substantial pressure loss. Even if doing calculations wasn't required, I would want to do them for myself for peace of mind. My belief has always been that you can't tax the system without verifying that it still works. John Irwin Manger - Fire Sprinkler Division Critical System Solutions, LLC Cell: 813.618.2781 Email: jir...@criticalsystemsolutions.com<mailto:jir...@criticalsystemsolutions.com> From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of Richard Carr Sent: Tuesday, August 30, 2016 7:08 AM To: sprinklerforum@lists.firesprinkler.org<mailto:sprinklerforum@lists.firesprinkler.org> Subject: RE: Flexheads in small renovation Are the relocates in the remote area? if not I would not calc. also , some flex brands are better that others as far as friction loss. Richard Carr, SET Branch Manager Cox Fire Protection, Inc 6555 Grace Lane. Jacksonville, Fl. 32205 rc...@coxfire.com<mailto:rc...@coxfire.com> 904-781-8227 From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of Todd Williams Sent: Tuesday, August 30, 2016 6:30 AM To: sprinklerforum@lists.firesprinkler.org<mailto:sprinklerforum@lists.firesprinkler.org> Subject: Flexheads in small renovation I have a client that did a 4 sprinkler relocate job in an office and used Flexheads (no sprinklers added). If the sprinklers were connected with hard pipe, I would probably not do hydraulic calculations. Given that we have FHs, should I be doing a full 900 or 1500 sqft calculation? Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT 860-535-2080 (ofc) 860-608-4559 (cell) Sent using CloudMagic<https://cloudmagic.com/k/d/mailapp?ct=ti&cv=6.0.64&pv=8.2>
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