What does the anode rod do for a hot water tank?

The primary function of the anode rod in a hot water tank is to help reduce corrosion of the tank. This component is typically made from magnesium, aluminum, or zinc and is designed to protect the tank's interior from rust. The anode rod works through a process called cathodic protection. In this process, the anode rod acts as a sacrificial metal, corroding more easily than the steel tank lining. As the rod deteriorates over time due to corrosion, it extends the life of the tank itself by preventing the metal of the tank from coming into contact with corrosive elements in the water, such as oxygen and various minerals.

The effectiveness of the anode rod is crucial in maintaining the integrity of the storage tank, ensuring that it lasts longer and operates efficiently. Regular inspection and replacement of the anode rod are necessary to ensure the continued protection against corrosion.