Step 4 · Restore Service and Test the System
With all plumbing reconnected and valves returned to their open positions, it's time to test your work. Double-check that the drain valve is fully closed and that the hot and cold water line connections are tight. Ensure the tank is completely full by verifying a steady stream of water is flowing from the hot water tap you had opened. Now, you can safely restore power by flipping the circuit breaker back ON, or restore gas by turning the gas valve handle parallel to the pipe and relighting the pilot light if necessary. Set the thermostat back to your desired temperature (e.g., 120°F). Allow 30-60 minutes for the water to heat up. Finally, go to each faucet, shower, and appliance in your home and test the hot water pressure. It should now be strong and match the cold water pressure. Make a final visual inspection of your work area for any signs of leaks.