Skip to main content

 

Moen Solutions

My Disposal is Leaking-New Installation

 
Water Around the Top of the Disposal 

 

Leaking around the top of a disposal is usually caused by one of the following.

  • Improper seating of the sink flange (fiber gasket, putty or tightening).
  • Loose mounting hardware screws allowing movement and leaking.
  • Damage or defective cushion mount.
Water Around the Middle of the Disposal 

 

First ensure that the water is not leaking from the top of the disposal and dripping down. Below are other common reasons for a leak.

  • Self Installation- A separate kit (1-1/2" drain discharge elbow) was  purchased :
    • Make sure the drain elbow gasket is being used and is installed over the drain discharge elbow itself. Click here for image  ​​​ (Note the gasket is to be installed behind the flange on the elbow,
  • Use the new drain discharge elbow, drain discharge elbow screws, and drain elbow gasket provided. It is not recommended to re-use the drain elbow gasket.
  • Drain Discharge Elbow:
    • The most common issue is that the drain elbow discharge screws on the drain discharge elbow are not tight.
    • Make sure the new drain discharge gasket is used and installed over the drain discharge elbow itself.Click here for image.   (Note the gasket is to be installed behind the flange on the elbow,
  • Dishwasher Connector (7/8" dishwasher connection):
    • Make sure dishwasher discharge connector and dishwasher clamp are tight.
    • Is there any visible damage to the dishwasher connector? 
Water Underneath of the Disposal 

 

Leaking from the outside of disposal housing:

  • Make sure dishwasher discharge connector and clamp are tight.
  • Check for visible damage to the dishwasher connector.

Leaking from the inside of housing (Water appears to leak out of the bottom of the disposal plate):

  • Drain Discharge Elbow: Make sure that the drain elbow gasket is on the drain discharge elbow and behind the flare of the drain discharge elbow with the metal flange behind that. .Click here for image.   (Note the gasket is to be installed behind the flange on the elbow,
    • If the drain elbow gasket is installed between the disposal and drain discharge elbow then the water may leak inside the shell making the water appear like it's leaking from inside. 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.
 

call1800.png

 
  • Was this article helpful?