how to install a pressure relief valve on a hot water heater

- Turn the water heater off. - Turn the water heater's water supply valve off. - Open the water heater's drain faucet and drain 5-gallons (may be more or less) of water out. - Unscrew or cut-off the relief valve's drain pipe. - Unscrew the relief valve and discard it. - Apply Pipe Thread Sealant to the new relief valve and screw it in. - Screw-on or solder-on the relief valve drain pipe to a length that's 6-inches above the floor. - Turn the water supply back on, to re-fill the water heater. - Turn the water heater back on.
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