Maintaining air gap in new Atwood water heater

An easy way to re establish the air gap is by injecting air into the water line. To do this drain the water from your water supply hose. Then re connect the hose to the water supply and to the RV. Turn the water supply on. Turn on a hot water faucet in your RV. Air from the hose will be forced into the water heater.

Every time you re connect an empty hose you re establish an air gap IF you open a hot water faucet first.