: I read your messages on water hammering but my problem with the hammering is during the night, it wakes us up from sleep. No faucets are running at that time so I wonder if it could be the hot water tank filling up or even an icemaker?
: Thanks for your time.

Icemakers do it all the time.
They make a mini-rester just for them, comes with 1/4" compression connections to go on the 1/4" OD copper lines. model, 660-TCO,
Terry