State
Hydrogen Sulfide Odor from Anode Reaction
State water heater: rotten egg or sulfur smell in hot water only.
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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
Magnesium anode rod reacting with sulfur bacteria, High sulfate content in water, Stagnant water in tank
How to Fix / Troubleshooting
Safety: Odor is unpleasant but typically not dangerous. If you suspect gas leaks, treat separately.
- Flush tank: Drain and flush the tank thoroughly to remove stagnant water.
- Disinfect: A plumber can chlorinate the tank and plumbing to reduce bacteria.
- Replace anode: Replace the magnesium anode rod with an aluminum/zinc anode designed for odor reduction, compatible with State tanks.
- Water treatment: Consider whole-house treatment if the problem is persistent.
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Repair Difficulty
Medium
3/5
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