The Water Heater Rod That Decides Whether Your Tank Rusts Out
Carson City – November 01, 2026 -- A replaceable rod inside a tank-style water heater can decide whether the tank lasts or rusts through and leaks, according to Tim Fessler and Dave Super, Plumbing Experts of Carson City, Nevada, in a new HelloNation article.
The anode rod corrodes so the steel tank does not
Most tank-style water heaters use steel protected by a glass lining. Small gaps or cracks can leave parts of that steel exposed to water. The anode rod is made of a metal that corrodes more readily than steel, so it draws corrosive activity away from the tank and is gradually consumed.
Once that material is gone, exposed steel becomes vulnerable. A tank that rusts through usually leaks and needs replacement.