Fleck Internal Bypass Within Valve

Softener appears to be in service but water bypasses the unit and remains hard.

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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

Broken or misinstalled piston, missing seals, cracked valve body, incorrect assembly after service

How to Fix / Troubleshooting

Safety first: Place the external bypass in bypass mode and depressurize before opening the valve head.

  • Verify external bypass: Confirm the external Fleck bypass is in service, not bypass.
  • Inspect internal components: Remove the control head and piston. Ensure all seals and spacers are present and correctly oriented.
  • Check for cracks: Examine the valve body for cracks that could allow mixing of hard and soft water paths. Replace if damaged.
  • Reassemble carefully: Follow the Fleck exploded diagram to reassemble the piston, seals, and spacers. Test hardness after returning to service.
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Repair Difficulty

Professional Required 5/5

Required Part

Fleck Valve Body
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