On another thread there are some videos from Dunbar Plumbing showing the black, stagnant water that comes out of the air side of a failed thermal expansion tank. I am wondering how to test a thermal expansion tank? I tap on mine once a month or so to make sure the air side sounds different from the water side. Is that enough?
Should we all be letting some air out of the Shrader valve periodically to see if there is water on the air side of the tank?
Should we all be letting some air out of the Shrader valve periodically to see if there is water on the air side of the tank?