Water heater noise after heating
I have a rheem 40 gal gas water heater that I installed in October in the garage. When it was installed it was silent. In the last few months I now hear a metal popping noise 5 or 10 minutes after the burner has shut off. I assume it is just something cooling down. It does not make a sound heating up.Is this normal for this model? Or is something going wrong? Otherwies the heater looks to be functioning normal.