Quote:
Originally Posted by bilcon
My home was 14 years before I go a new hot water heater. I never had a problem and only replaced it because I also got a new A/C - heating system installed.
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The expansion tank can fail and you may or may not have a water pressure issue. The expansion tank is designed to maintain a safe pressure in the event that you have thermal expansion or some other high pressure issue. So, you may have had a failed expansion tank years before you replaced the water heater. Expansion tanks usually do not last as long as the water heater tank.