McAlpine Internal Chamber or Shaft Seal Leak

Water drips from the very bottom of the disposal housing even when the unit is off, especially when the sink is full.

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.

Possible Causes

Failed McAlpine shaft seal, Cracked internal grinding chamber, Corroded housing, Overpressure from blocked outlet forcing water past seals

Safety first: Turn off power and place a container under the unit.

Differentiate leak source: Dry the unit and run water without operating the motor. If water appears from the bottom centre, the leak is internal.
Check outlet for blockage: Ensure the outlet and trap are clear to reduce pressure on internal seals.
Avoid continued use: Do not continue to operate a disposal with an internal leak, as water can reach live electrical parts.

Internal leaks are not normally repairable in the field; replace the complete McAlpine disposal.

Professional Required 5/5

Complete McAlpine Disposal Unit

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