Step 8 · Restore Power and Test Operation
Once you have confirmed that there are no leaks and the tank is full, go to the electrical panel and switch the water heater's circuit breaker back to the 'ON' position. For a gas heater, follow the manufacturer's instructions to relight the pilot light. Allow the heater 30-60 minutes to heat the water. As a final check, place a bucket under the discharge pipe and briefly lift the test lever on the T&P valve. A burst of hot water should discharge, and the valve should snap shut cleanly when you release it. This confirms it is functioning correctly.
Tools and Materials
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