Rheem
Hydrogen Sulfide Odor in Hot Water
Rheem water heater emits a rotten egg or sulfur smell from hot water taps
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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
Reaction between magnesium anode rod and sulfur bacteria, High sulfate content in water, Stagnant water in tank
How to Fix / Troubleshooting
Safety first: Odor is unpleasant but typically not dangerous. If you suspect gas leak instead of water odor, evacuate and call your gas supplier.
- Confirm source: Check if odor is only in hot water. If cold water also smells, the issue is with the supply, not the heater.
- Disinfect tank: Turn OFF heater, drain tank partially, then refill with a solution of household hydrogen peroxide (follow Rheem or local guidelines). Let sit, then flush thoroughly.
- Replace anode rod: Consider replacing the magnesium anode rod with an aluminum/zinc alloy or powered anode designed to reduce odor.
- Increase temperature temporarily: Raising tank temperature to 140°F for several hours can help kill bacteria (use caution and warn occupants about scald risk).
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Repair Difficulty
Medium
3/5
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