Kinetico Hydrogen Sulfide Breakthrough

Water has a rotten egg (sulfur) smell even after softening.

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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

Hydrogen sulfide in raw water, Bacterial growth in plumbing, Softener not designed to remove sulfur, Fouled resin

How to Fix / Troubleshooting

Safety first: Hydrogen sulfide is usually noticeable at low levels; high levels can be hazardous in confined spaces.

Source identification:

  • Test water for hydrogen sulfide before and after the softener.
  • Check if odor is present only in hot water (often indicates water heater issue).

System limitations:

  • Standard Kinetico softeners are not designed to remove significant hydrogen sulfide.

Resolution: Install a dedicated sulfur filter or oxidizing system ahead of the softener. Shock-chlorinate the plumbing and water heater if bacterial growth is suspected. Resin replacement may be needed if heavily fouled.

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Repair Difficulty

Medium 3/5

Required Part

Upstream Sulfur Filtration (Additional Equipment)
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