Pentair Sta-Rite
Failed Mechanical Shaft Seal
Pump leaks water between the motor and pump housing
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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 shaft seal faces, Running pump dry, Chemical imbalance causing seal degradation
How to Fix / Troubleshooting
Safety: Turn off power, close valves, and relieve system pressure before disassembly.
- Confirm leak location: Observe water dripping from the junction between the motor and the pump seal plate. This indicates a shaft seal leak.
- Disassemble pump: Remove the housing clamp or bolts and separate the motor/impeller assembly. Remove the impeller to access the shaft seal components.
- Replace shaft seal: Install a new OEM Sta‑Rite shaft seal kit matched to your pump model (e.g., Max‑E‑Pro, Dyna‑Glas). Carefully press the ceramic seat into the seal plate and the rotating carbon piece onto the impeller.
- Do not touch seal faces: Avoid touching the polished seal faces with bare fingers; use clean gloves or tissue.
- Reassemble and test: Reassemble the pump with new gaskets and o‑rings, restore power, and check for leaks.
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Repair Difficulty
Medium
3/5
Required Part
Mechanical Shaft Seal Kit
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