water heater buzzing when running water
My suburban water heater is making a buzzing sound when we run the hot water. Anyone have any ideas?
Forum Discussion
It might be the check valve on the hot outlet is a bit gummed up with mineral build up. If you can readily access the back of the tank, hold your hand on the check valve (looks like a coupling with an arrow on it) while someone runs some hot water. The check valve can be removed and soaked in vinegar or CRL to clean it up, or replaced.
