Davey Failed Mechanical Shaft Seal

Pump leaks water between the pump housing and the motor.

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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

Worn ceramic/carbon seal faces, Running pump dry causing seal overheating, Chemical imbalance (low pH) attacking seal elastomers, Age-related wear

How to Fix / Troubleshooting

Safety first: Isolate power and close valves before removing the pump from the system. Water may spill when disconnecting unions.

Step-by-step checks:

  • 1. Confirm leak location: Dry the area and observe while the pump runs. If water appears at the join between the wet end and motor, the mechanical seal is likely leaking.
  • 2. Plan for seal replacement: Mechanical seal replacement involves separating the wet end from the motor, removing the impeller, and pressing out the old seal. This is a moderate to advanced repair.
  • 3. Replace seal: Obtain the correct Davey mechanical seal kit for your model. Follow a service manual or have a technician perform the replacement to avoid damaging the ceramic face.

After seal replacement, always re-prime the pump and check for leaks.

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Repair Difficulty

Hard 4/5

Required Part

Mechanical Shaft Seal
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