Aquasana Control Head O-Ring or Tank Neck Leak

Water leaks from around the Aquasana control head on top of the 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 tank O-ring, Cracked resin tank neck, Control head not tightened evenly, Debris on sealing surfaces

How to Fix / Troubleshooting

Safety first: Immediately place the softener in BYPASS and shut off the main water supply if leak is severe. Unplug power.

Steps to repair control head leak:

  • 1. Depressurize: Open a nearby faucet to relieve pressure.
  • 2. Remove control head: Follow Aquasana instructions to disconnect plumbing unions and lift the control head off the resin tank.
  • 3. Inspect O-ring and neck: Examine the large tank O-ring for cuts or flattening. Inspect the tank neck for cracks or chips.
  • 4. Clean and replace: Clean sealing surfaces and replace the O-ring with an Aquasana-compatible tank O-ring. Lubricate with silicone grease.
  • 5. Reinstall head: Seat the control head squarely and tighten per manufacturer torque guidelines. Do not overtighten.
  • 6. Restore water and check: Slowly pressurize and check for leaks.
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Repair Difficulty

Hard 4/5

Required Part

Resin Tank O-Ring
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