Rheem 0.625 in. Diameter x 42 in. Long Aluminum Anode Rod for Water Heaters

Anode rods are the most important line of defense in preventing corrosion and leaks in your water heater. These devices work because the metal in the rod is sacrificed so the tank does not corrode. As the anode works, the life of the water heater is increased. The anode should be checked and replaced every couple of years. This Rheem PROTECH is 3/4 in. NPT x 42 in.