Morton Valve Head or Tank O-Ring Leak

Softener leaks water from around the valve head or between the valve and resin tank.

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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

Damaged valve-to-tank O-ring, Cracked valve body, Loose tank adapter, Over-tightened plumbing stressing valve

How to Fix / Troubleshooting

Safety first: Unplug the unit, place it in bypass, and depressurize by opening a nearby faucet. Have towels or a pan ready for water.

  • Identify leak source: Dry the area and observe where water emerges—around the valve-to-tank connection, side ports, or top cover.
  • Check plumbing stress: Ensure inlet and outlet plumbing are properly supported and not putting sideways stress on the valve head.
  • Reseat valve head: If leaking at the tank connection, remove the valve head from the resin tank. Inspect and clean the tank O-ring and sealing surfaces. Replace the O-ring if flattened, cracked, or nicked.
  • Inspect valve body: Look for hairline cracks in the valve body, especially near threaded connections. Replace the valve body if cracked.
  • Reassemble and test: Reinstall the valve head, tighten evenly, restore water, and check for leaks under pressure.
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Repair Difficulty

Medium 3/5

Required Part

Valve-to-Tank O-Ring
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