How do i install a pop-off valve on my electric hot water heater?
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First, turn off the power to the water heater. Second, turn off the water to the heater. Third, open some faucets in the house, and connect a hose to the drain of the heater, and open the drain. Next, remove the old T&P valve, and purchase one that is a match for it. Use Teflon tape, and pipe dope compound on the threads, to ensure you don't have any leaks. Now, close the drain, remove the hose, turn off all open faucets, and turn the water back on to the heater. Before you turn the power back on, run water through the faucets, to ensure the heater is full of water. Now you can turn the power back on. The drain pipe from the T&P, is 3/4" pipe, and should terminate outside of the building, approximately 6" above the ground. Good luck!
by pop off valve do you mean a pressure relief valve? If yes then there should already be a tap on the heater where you would screw the valve right in. What you need to do is find out what pressure the manufacturer recommends and get that pressure valve. Also when you install it, it needs to be piped to within so many inches of the floor, consult your local building codes.
Unscrew the old one, and replace it with the new one. Be sure to use either pipe thread compound or plumbers tape.
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I strongly suggest you turn off the water supply to the house, open the taps to let the pressure drain out, then replace the Pressure relief valve on your tank...make sure it is piped to within about 4" off the floor if it is inside...othewise, you could be scalded if it goes off. Make sure you meet building code. Good luck
According to Federal Regulations all Electric and Gas water tanks have pop off valves installed on them in the factory.
You need to put a piece of pipe on the already existing pop off valve about 3 feet long its 1/2 NPT threads Plastic or steel is oK and point the pipe downward to the floor. .
Turn off water. Relieve pressure on tank by opening a hot side of a fixture, AND CLOSE IT. Unthread relief line from valve (You may have to cut line first). Unthread valve (CCW), and change out quickly to minimize water loss. Home water heater relief valves are typically standard, except for the shaft depth.
Listen to poppyman54.
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