Foridra Hydrogen Sulfide or Bacterial Contamination in Plumbing

Softener emits a rotten-egg odor in softened water

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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 source water, Bacterial growth in resin bed, Infrequent regeneration, Warm stagnant plumbing lines

How to Fix / Troubleshooting

Safety: Do not drink water with strong sulfur odor until tested. Ventilate the area when using disinfectants.

  • Source test: Test raw water (before Foridra softener) for hydrogen sulfide. If present, a dedicated H2S filter may be required.
  • Sanitize resin tank: Follow Foridra guidelines to sanitize the resin tank using an approved disinfectant (often a measured amount of bleach introduced into the brine well before regeneration).
  • Increase regeneration frequency: Program more frequent regenerations to reduce stagnation.
  • Flush plumbing: Run all taps for several minutes after sanitization to clear lines.
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Repair Difficulty

Medium 3/5

Required Part

Foridra resin tank and resin media
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