Backflow (1/2" Watts 009QT) spraying water from the top - Page 2 - Plumbing Zone - Professional Plumbers Forum
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Old 03-09-2020, 03:00 PM   #11
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Correction: 65-70psi on the gauge at the filter downstream of the RP. After doing a little more research I'm pretty sure we're having a water hammer situation upstream of the device. I did a test on the device: check 1 at 8.0psi, apparent pressure 65psi, relief valve opens at 5.1psi, & check 2 is tight (all good).
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Old 03-09-2020, 09:44 PM   #12
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they dont last forever, I think a new one is around $200.00, you wasted more in time and labor than the cost of a new RPZ..
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Old 03-10-2020, 12:10 PM   #13
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Quote:
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they dont last forever, I think a new one is around $200.00, you wasted more in time and labor than the cost of a new RPZ..
Even though the device tests ok?
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Old 03-10-2020, 03:57 PM   #14
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Quote:
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Even though the device tests ok?

its leaking, so its not ok, how much time are you gona waste to fix a leak? you tried twice and it still leaks, so either you dont know how to fix it or there is an unfixable defect....it will take about an hour at most to swap it out and be done, send a bill and move on to another job...
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Old 03-10-2020, 10:11 PM   #15
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Quote:
Originally Posted by ShtRnsdownhill View Post
its leaking, so its not ok, how much time are you gona waste to fix a leak? you tried twice and it still leaks, so either you dont know how to fix it or there is an unfixable defect....it will take about an hour at most to swap it out and be done, send a bill and move on to another job...
Great point gotta bite the bullet and get it fixed . SWap in a new!then take the old one home and figure out
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Old 03-11-2020, 07:05 AM   #16
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Could be the brass casting itself which is worn and won't accept a seal. I had a customer with the most beautiful moen 8710 I have ever seen. It was 30 years old. One of our other plumbers was there two weeks before me and we both swapped the cartridge and replaced all the seals. Leaked after both of us. Had to scrap it. The moen 8710 is my favorite faucet.







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Old 03-12-2020, 12:26 AM   #17
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Talked to a Licensed Plumber friend of mine who is backflow Certified
says to buy a new backflow not worth trying to repair, and most times
repairs will not work
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Old 03-16-2020, 01:51 PM   #18
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So what happened did you repair it replace it or ignor it? If you put a brand new one did that leak? If your going to ask a qyestion share what you did that way . we get something back to learn from. Was it worth repairing? not worth it? did you f it up whatever. hey ive screwed a few things up myself.
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Old 09-15-2020, 09:32 PM   #19
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Bad oring on the shaft of the relief valve. Or a pinhole in the relief.
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