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Old 08-15-2011, 10:00 PM   #1
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Problem with pressure release valve in hot water heater?


I had a plumber come into replace a valve 8 months ago and he had to replace the pressure relief valve on my water heater after it got stuck when he drained water. It never released any water before now. I put a cup under the valve and it seems to be collecting water every time I am taking a hot shower. It could happen other times I am not aware of. Its not a constant drip and never caught it releasing water. I know it is suppose to do this, but not sure why it is now all of the sudden. Its a bradford white, power vent, natural gas and 10 years old.

I just want to know if there is a problem and if I should do anything. I am collecting about an 8 oz cup of water a week.


Last edited by da_man; 08-15-2011 at 10:03 PM.
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Old 08-15-2011, 10:10 PM   #2
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Problem with pressure release valve in hot water heater?


If your water is too hot, or pressure is too high this can happen. Try "flicking" it and see if it re-seats.

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Old 08-16-2011, 08:50 AM   #3
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Problem with pressure release valve in hot water heater?


I agree that if your water temp. setting is too high this could possibly cause your safety valve to unseat. If you had it replaced by a licensed plumber, then I would call them back to check out. This should not leak at all.
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Old 08-16-2011, 09:14 AM   #4
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Problem with pressure release valve in hot water heater?


Quote:
... every time I am taking a hot shower ...
Water (the next tankful) expands when heated.

Does your water system have an expansion tank (usually located above the water heater)?

If not then you may need one. If so maybe it needs recalibration.

In this case, recalibration consists of turning off the water, opening a faucet, and gently pumping air into the other end of the expansion tank to get about 5 PSI sustained. Then cap the air valve and turn the water back on. (Some expansion tanks have instructions for more precise calibration.)
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