On Sunday, February 5, 2017 at 9:44:05 PM UTC-5, tony wrote:
replying to blueman, tony wrote:
I do not see any benefits on the hot water heater.

He just said that without an expansion tank, the pressure goes
up to 100 PSI and the TPR valve starts leaking.




However if that was heater
for house that would be different story. No expansion thank for water heater
is unnecessary it will do nothing for you,

See above.