Step 5 · Remove the Old T&P Valve
Now you can remove the valve itself. Position your large pipe wrench onto the hexagonal body of the old T&P valve. Ensure you have a firm grip. Apply steady pressure in a counter-clockwise direction to break the seal and unscrew the valve from the tank. This may require significant force, especially if the valve is old and corroded. Once it's loose, you can typically finish unscrewing it by hand. Be prepared for a small amount of water to spill out; have your rag ready.