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8

When installed properly, the life should be indefinite. The hot/cold should have little effect, unless those temperatures are extreme.


1

A water expansion tank gives water a place to expand in a closed system (frequently found with boilers, or home water supplies with a check valve). Otherwise, heated water cannot expand and instead increases pressure until some component of the system leaks or explodes. If the tank is on the hot water heating system, then it's there to relieve expansion ...



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