Quote:
Originally Posted by nn0wheremann
Don’t fix what is not broken. That said, you are a year behind mine, and it just needed replacement. It developed a small leak, controlled by the pan beneath it, and drained to the outside.
Do not sweat the expansion tank, most likely it is government over reach to subsidize some political donors from the plumbing industry. You have not needed one for the past 21 years, right?
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If there was no backflow preventer in the water supply line, your water pressure would always remain at supply pressure. With a backflow preventer, as cold water expands when it is heated, it increases the pressure on the water heater and pipes in your house.