A sacrificial anode is a crucial component in storage water heaters, designed to protect the tank from rust and corrosion. Anodes are made of a softer metal (usually Magnesium) than the tank. This allows them to corrode first through a process called electrolysis, effectively “sacrificing” themselves to protect the tank. By regularly replacing the anode (every 3-5 years) you can more than double the life of your hot water system.
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