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Drain Valve Replacement

Step 1: Turn the gas control to the pilot setting. This is so the water heater won’t fire while it’s being worked on.
Turn gas control to pilot

Step 2: Close the cold water supply off to the water heater.
Close the cold water supply to the tank

Step 3: Attach a hose to the tank, and drain the water heater completely. To speed up this process, open a hot faucet to allow air into the system while it’s draining.
Drain the water heater completely

Step 4: Apply teflon tape to the new drain valve.
Apply teflon tape to the new drain valve

Step 5: Remove the old drain valve with an adjustable wrench or pliers.
Remove the old drain valve

Step 6: Install the new drain valve hand tight first, then the remainder with a wrench.
Install the new drain valve

Step 7:  Open the cold water supply only partially to allow the tank to fill slowly. This will help reduce water hammer.
Open the water supply partially

Step 8: Open a hot faucet preferably at the highest point in the residence. Leave the faucet open as the tank is filling to purge all the air from the system. Once the faucet runs steady water without any air, the faucet can be closed.
Open a hot faucet

Step 9: Open the cold water supply fully, and check for leaks.
Open cold water supply fully

Step 10: Turn your gas control back to the on position.
Turn gas control to on

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