Make it snug, and finish it so that the opening of the valve points downward or to the side. You can buy a new valve, wrap it with three turns of Teflon tape and screw the valve back in. Use a pipe wrench and unscrew the relief valve from the tank. This pipe will be connected to the valve by some type of a union or flex pipe. The relief valve will have a drain pipe leading out to the exterior. It may be that the seat is corroded to the point where you must replace the water heater. If your valve is leaking from the seat of the water heater (the place where the valve screws into the tank), you may try to remove the valve and wrap some Teflon tape or paste around the threads and reseat the valve. If the valve doesn’t shut off, you should replace it. If it doesn’t, you can toggle the tab again or try tapping the top of the valve gently with a hammer. Testing a relief valve involves lifting up the metal tab and allowing water to pass through the drain pipe.Īfter releasing the tab, the valve should stop. Periodic testing of the valve is important, but often, it will not completely seal up after testing. Imagine the damage a projectile of this size and weight could do to a house and its occupants. A little side note: The velocity was measured at 900 feet per second. The force of the explosion launched the water heater into the air where it stayed aloft for more than 9 seconds and landed some 400 feet away. The thermostat was kept on until the tank exploded. The testers dug a hole in the ground as deep as the height of the water heater. There is a video showing the force an exploding tank can exert (view it at ), and the test was done with only a 12-gallon electric water heater, and the relief valve was plugged to hold the pressure in, simulating what would occur if the relief valve failed to operate. The valve’s opening allows cold water into the tank to prevent boiling and the possibility of an explosion.Īlthough you don’t often hear of a water heater exploding, it does happen. This valve helps prevent your water heater’s tank from exploding, and it will open if the temperature inside the tank exceeds 210 degrees or if the pressure inside the tank exceeds 150 psi. It is simply a valve that allows excess pressure to exit the water heater’s tank. This is an extremely important component that helps make sure your water heater operates safely.
How can I fix the leak on this piece?Ī: You are referring to the temperature and pressure relief valve (T&P or pop-off valve). There is a pipe that comes out of the valve at a right angle that looks like it goes through the wall. Q: My water heater leaks from some type of a brass valve on the side of the tank near the top.
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