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What is an anode rod and what is it for?

April 26, 2017Anode Rod

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What is an anode rod and what is it for?

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• Water heaters have a metal rod installed that sacrifices itself to cathodically protect the tank from corrosion. It is made with light metals such as aluminum or magnesium so that it deteriorates more easily than the steel that makes up the tank. Without this protection, the tank would deteriorate very quickly. Water heaters with longer warrantees will generally have larger anode rods.