Step 8 · Refill the Tank and Check for Leaks
The installation is now complete, and it's time to refill the tank. First, ensure the drain valve at the bottom of the tank is fully closed. Also, make sure the hot water tap you opened earlier is still open. Go to the cold water inlet valve and slowly open it to begin filling the tank. You will hear water flowing and air sputtering from the open hot water tap. Leave the tap open until you have a steady, air-free stream of water coming out. This signifies the tank is full and all air has been purged. Once the tank is full, close the hot water tap. Thoroughly inspect the new T&P valve and its connections for any signs of leaks.