American Water Heaters
Internal Corrosion / Anode Depletion
Rust-colored or discolored hot water from American Water Heaters tank.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Depleted anode rod, Corroded steel tank, Iron in water supply, Bacterial growth in tank
How to Fix / Troubleshooting
Safety: Allow water to cool before working on the anode. Use proper lifting techniques; anodes can be heavy.
- 1. Flush tank: Drain several gallons from the drain valve until water runs clearer.
- 2. Inspect anode rod: Shut off water, relieve pressure, and remove the anode rod from the top of the tank. Replace if heavily consumed (less than 1/2 inch core remaining).
- 3. Evaluate tank age: If the heater is old and rust persists, internal tank corrosion may be advanced; replacement of the heater may be the only long-term solution.
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Repair Difficulty
Medium
3/5
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