Pressure relief valve


Old 04-18-03, 09:16 AM
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Pressure relief valve

I have a 75 gal water heater that is about 4 years old. The pressure relief valve is leaking about a cup of water once a day. I opened the valve and drained about a gallon out, but it is still leaking. I don't have any literature about the heater so I'm at a loss as to why it is leaking. Any Ideas?
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Old 04-18-03, 09:49 AM
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Temperature & Pressure relief valves can just go bad.
Replace the T&P valve. You can do a Search above on the how-to, or just come back and ask on this same thread.
Good Luck!
Old 04-18-03, 06:59 PM
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While you are searching the forums, look up thermal expansion devices... I believe you DO need to go ahead and replace the relief valve if it has been going off periodically as the spring is going to wear out prematurely... But it may just be doing its job correctly... If thermal expansion is causing your pressure to climb during periods of non-use such as overnight, then the relief valve may just be blowing off minor amounts of water due to pressure...
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