I'd slap a tee with gauge and another test valve on #1 without losing any sleep. If you want to dot your eyes, I'd send a sketch to the local water guys and ask if they see a problem with it- after all, they're the ones whose system is being protected. And most water guys are pretty logical, unlike listing standards :)
Despite all the bad economic news, we all have a lot to be thankful for, so pause and thank your supreme being for all that you do have, and thank your significant other for tolerating you for another year :) and be glad your primary focus, hopefully, isn't residential construction. glc -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Thom McMahon Sent: Tuesday, November 25, 2008 6:19 PM To: [email protected] Subject: RE: Gauge in Backflow Test Cock? The #1 test port is for the installation of a gauge or the connection of the differential pressure gauge during testing. This port is located on the #1 shut off valve, on the supply side of that valve so it has pressure even with the valve closed. I know of nothing in the literature which say's leaving this port open to a gauge is going to void the backflow listing since no flow is actually taking place. I have even seen them installed using a quick coupling like used on air hoses, so they can be removed to install the test equipment and replaced after the test. Occasionally we see gauges in the blow down port of the wye strainer in front of the BFP, but this is a bad place, since it is where all the garbage you collect using the strainer is to collect until you blow it down. Thom McMahon, SET Firetech, Inc. 2560 Copper Ridge Dr P.O. Box 882136 Steamboat Springs, CO 80488 Tel: 970-879-7952 Fax: 970-879-7926 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jimmy Waite Sent: Tuesday, November 25, 2008 3:43 PM To: [email protected] Subject: Gauge in Backflow Test Cock? Dear Forum, I've come across a bit of a quandary. In the '07, 8.16.1.1.3.2 allows a backflow preventer to be considered a check valve. 7.1.1.2 says that I have to have a pressure gauge above and below my system check valve. We use Tyco's riser manifold which has a pressure gauge attached. In our typical single wet system riser, we place our backflow on the underground, and our manifold on top of the backflow. So, where would my upstream pressure gauge go? It would seem that my only two options are to tap a short piece of pipe below the backflow, or put a gauge in the backflow test cock. I'm going to verify with Ames, but I'm assuming you can't put the gauge in the test cock without voiding the listing of the backflow. So, am I missing an option? How does everyone else meet these requirements? Thanks, Jimmy Waite Burtell Fire Protection 406-652-7697 x 15 [EMAIL PROTECTED] _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [EMAIL PROTECTED] To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [EMAIL PROTECTED] To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [EMAIL PROTECTED] To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
