What is the correct method for leak testing a replaced gas water heater?

The correct method for leak testing a replaced gas water heater is the use of a soap or leak detection device combined with a 10-minute dial test at normal working pressure. This approach is effective because it allows you to visually detect any gas leaks in the connections and fittings. Using soap bubbles helps identify small leaks by observing whether bubbles form at the joints, while the 10-minute dial test ensures that there is no drop in pressure on the manometer, indicating the integrity of the system.

The soap or leak detection method is commonly recommended because it provides both immediate visual confirmation of leaks and can be performed quickly. Conducting the test under normal working pressure also ensures that any potential leaks that could occur during regular operation are addressed before putting the heater back into service. This method balances thoroughness with practical application for technicians working with gas appliances.