
a rod inside of a water heater that protects the tank from corrosion; usually made of magnesium or aluminum; most manufacturer warranty lengths vary depending upon the quality of the anode rod of a water heater.
Found on
https://www.encyclo.co.uk/local/22545

An anode rod, when used in a water heater, attracts corrosion causing products in the water. These products attack the anode rod instead of the metal tank itself. The anode rod should be inspected yearly and changed when it is reduced to about 1/4 of its original size. The rods are used in steel water heater tanks
Found on
https://www.encyclo.co.uk/local/23310
No exact match found.