A while back my gas water heater T&P valve was leaking, so I purchased & installed a new one. A day later, the new one was doing the same thing. I finally called a plumber as I thought the thermostat was the problem. A plumber from Ross Plumbing indicated that the real problem was the expansion tank - and that was a lot less expensive than a new tank / thermostat. What a refreshing concept: honesty. I will call them without hesitation.
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