| Task | Description | Duration |
|---|
| 1 | Checking the Sacrificial Anode. Sacrificial anode rods protect the inside of water heater tanks from a process called galvanic corrosion. Because water heater tanks are made from metal that's susceptible to corrosive elements in water, the anode sacrifices itself to protect the tank. The anode freely gives up ions so electrolysis does not dissipate the steel of the tank. | 30 minutes |
| 2 | Turn Off the Unit. Turn off the electricity to the water heater or turn off the gas to extinguish the pilot. Open a facet to run the water cold. | 5 minutes |
| 3 | Locate the Rod. Locate the sacrificial anode rod. This water heater component typically hangs down into the tank from the top. | 5 minutes |
| 4 | Drain some water from the water heater. Shut off the incoming cold water. Attach a garden hose to the drain valve. Open the drain valve and let a few gallons of water drain from the water heater. | 5 minutes |
| 5 | Remove the Rod. Using an electric impact wrench, use a 1 1/16 deep well socket to remove the anode. | 5 minutes |
| 6 | Inspect the Rod. Perform a visual inspection. A rod in good working condition should be smooth and around a half inch in diameter. If the sacrificial anode rod shows signs of deterioration or has several inches of exposed core wire, replace it. | 5 minutes |
| 7 | IF NEEDED Install a New Rod. Determine the type of sacrificial anode rod your water heater needs, typically magnesium, aluminum or zinc. Install the new part in place of the old one, making sure to properly align all parts and secure all threaded screws. | 10 minutes |
| 8 | Turn the Unit Back On. Refill the water heater, purge all the air from the tank by running a faucet for several minutes. Turn the power on or relight the pilot light, and check for leaks. | 5 minutes |