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Moen Solutions

My Disposal is Leaking-Existing Disposal


Water Around the Top of the Disposal 

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  • Inspect the mounting hardware for rust or deterioration.
  • The sink flange sealant or fiber gasket may need to be replaced.
  • Verify that the mounting assembly screws have not loosened.
  • The cushion mount may be damaged and needs to be replaced.
Water Around the Middle of the Disposal 

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  • Dishwasher connector could be damaged or deteriorated.
Water Underneath of the Disposal 

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Outside of housing:

  • Make sure dishwasher connector and clamp are tight.
  • Is there any visible damage to the dishwasher connector?

Inside of housing:

  • Make sure the drain discharge elbow screws are tight. Please note that the drain discharge elbow screws have Loctite on them.
  • If the disposal is running then there is no damage to the disposal. Water does not normally get into the motor. If the disposal motor still runs, then the water has not penetrated the motor housing. This leak is serviceable.

To verify the origin of a leak, perform the following leak test.

Leak Test

 Basic Test

  1. Place sink stopper in sink and fill the sink with water.
  2. Wrap paper towels directly at the very top of the disposal around the sink flange.
  3. Wrap paper towels around the drain discharge elbow on the side of the disposal where it connects to the disposer.
  4. Wrap paper towels around the drain discharge elbow on the side of the disposal where it connects to the disposer.
  5. Once you have wrapped all the necessary places, release the stopper and let the water drain.
  6. Check all of the paper towels to see if they are wet.
  7. If any are wet, the leak is coming from that area and is caused by an issue with the installation of that specific item.

  If the basic test did not determine where the leak was coming from, re-check the drain discharge elbow gasket. If the drain discharge gasket is improperly positioned or damaged, water can travel down in between the shell and the disposal and drain out by the cover plate on the bottom.

The best way to inspect the drain elbow gasket is to pull the two screws and metal flange back from the drain discharge elbow.

  • The drain elbow gasket is used and properly installed over the drain discharge elbow itself. Click here for image  ​​​ (Note the gasket is to be installed behind the flange on the elbow,
  • When reinstalling confirm the drain discharge elbow screws are tight.




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