It took me years to convince water department inside was the place for backflow units, or DDCVA. One of the features that finally helped convince them was a clear demarcation of responsibility for line maintenance. Putting a flange x flange shut off valve at the property line, with PIV for handle was one of the keys. It took a long time to stop, or mostly stop, putting them in below ground vaults. A PI is much cheaper than a vault sized for an 8” dbl detector check valve assembly.
And our winter water table was commonly 48” below grade. Best. Bruce Verhei > On Dec 3, 2018, at 20:51, AKS-Gmail-IMAP <[email protected]> wrote: > > When you step through the changes over the years in NFPA regarding the > roadway box setup for fire protection service you will notice there was a > change a couple of years back that eliminated the AHJ’s prerogative to demand > the post indicator setup. The wording change is subtle but it definitely > removed the AHJ's prerogative as if that was the change’s specific intent. > That is how I recall it. I do not believe this has ever been mentioned here. > Good luck convincing the dyed-in-the-wool followers who are used to a former > standard that one might figure was too basic to ever get changed. Keep in > mind there are some cities with an ordinance that straight up requires the > PIV setup. > > Allan Seidel > St. Louis, MO > >> On Dec 3, 2018, at 3:26 PM, Prahl, Craig/GVL <[email protected]> wrote: >> >> NFPA 24 calls for indicating type valves on water supplies serving >> sprinklers. Non-indicating type valves for sprinkler water control are >> permitted only when approved by the AHJ. So it’s totally within the right >> of the AHJ to require a PIV outside the room on the UG run-in. >> >> In some cases when there is no place to install a PIV, sometimes the AHJ has >> allowed a Wall Post Indicator Valve to be used. >> >> Craig Prahl | Jacobs | Group Lead – Fire Protection | 864.676.5252 | >> [email protected] | www.jacobs.com >> >> From: Sprinklerforum <[email protected]> On >> Behalf Of Bruce Verhei >> Sent: Monday, December 03, 2018 3:47 PM >> To: [email protected] >> Subject: [EXTERNAL] Re: RE: >> >> To follow JD’s comment, new or existing would to me be the big question. Or >> said another way, if new, why weren’t approved plans followed? >> >> Best. >> >> Bruce Verhei >> >> On Dec 3, 2018, at 12:10, Matt Grise <[email protected]> wrote: >> >> There is a city we work in where every building must have a PIV. I don’t >> know if that is in the code, but the fire department won’t approve a system >> without one. >> >> Matt >> >> From: Sprinklerforum <[email protected]> On >> Behalf Of Randy Huffman >> Sent: Monday, December 03, 2018 2:06 PM >> To: [email protected] >> Subject: >> >> We have a riser room at the rear of a building. An exterior door opens to >> interior of riser room which contains a backflow preventer with two >> indicating control valves, a rise check valve, and a water flow switch. >> Underground line to building has a nonindicating gate valve in roadway box >> some distance from door to riser room. AJH says a post indicator valve must >> be installed outside riser room. We believe the current arrangement of >> piping and valves meets the standard without the PIV >> Please comment. >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org >> >> >> NOTICE - This communication may contain confidential and privileged >> information that is for the sole use of the intended recipient. Any viewing, >> copying or distribution of, or reliance on this message by unintended >> recipients is strictly prohibited. If you have received this message in >> error, please notify us immediately by replying to the message and deleting >> it from your computer. >> _______________________________________________ >> 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
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