DAB
Failed Mechanical Seal
Pump leaks water between the pump housing and motor, often forming a rust trail on 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
Normal wear of mechanical seal faces, Running pump dry, Chemical imbalance (low pH) attacking seal, Incorrect installation of replacement seal
How to Fix / Troubleshooting
Safety first: Turn off power and close isolation valves. Allow the pump to cool before working on it.
Steps to check:
- Confirm leak source: Dry the area and run the pump briefly. Observe if water appears at the joint between the pump housing and motor flange.
- Disassemble wet end: Remove the pump housing and impeller to access the mechanical seal.
- Replace seal: Install a new DAB‑compatible mechanical seal, ensuring the ceramic and carbon faces are clean and not touched with bare fingers. Follow DAB orientation and seating instructions.
- Inspect shaft: Check the motor shaft for corrosion or grooves. Severe damage may require motor replacement.
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Repair Difficulty
Hard
4/5
Required Part
DAB mechanical seal
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