"Tom" wrote in message ...

"Tom" wrote in message
...

"Steve Barker DLT" wrote in message
...
that sounds like the most likely cause. An expansion tank would cure
that problem, IF in fact that's what's happening. ANOTHER cheap way of
dealing iwth the problem would be to flush a toilet AFTER turning the
water off for the night. THEN when the WH causes expansion, it could
just flow into the now emtpy toilet tank.


The toilet tank will fill with cold water. That will help with the WH
tank expansion?

Yes, it takes pressure off the system from the main. Water expanding can go
backwards too.