McAlpine Failed Sink Flange Seal

Water leaks from the top of the disposal where it meets the sink, often visible around the mounting ring.

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

Dried or cracked McAlpine sink flange gasket, Insufficient plumber's putty, Loose mounting ring screws, Distorted sink flange from overtightening

Safety first: Isolate power and support the disposal before loosening the mounting assembly.

Confirm leak: Fill the sink with water and look under the sink for drips around the top of the disposal.
Remove disposal: Rotate the mounting ring to release the McAlpine unit and set it aside.
Renew seal: Remove the old gasket and putty. Fit a new McAlpine sink flange gasket and apply fresh plumber's putty under the flange if specified.
Reassemble: Tighten the mounting screws evenly to compress the gasket, then refit the disposal and test.

Medium 3/5

McAlpine Sink Flange Kit

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