Quote:
Originally Posted by jayl45
Had this problem several years ago. Plumber replaced expansion tank on water heater and problem went away.
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That is the answer. It is a fairly common problem. My plumber charged around $100. Some charge more. Get a quote over the phone when you describe the problem.
Don't knock yourself out changing the valves. There are several in the house. Besides, you will still have a defective expansion tank.