How to Replace the Black Rubber Cover on a Sink Drain

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The black rubber cover inside the sink drain covers the garbage disposal and keeps water and food from splashing out of the disposal as it grinds up discarded food. The cover also muffles the sound of the disposal as it operates. Pushing garbage into the disposal with sharp utensils can slice through the rubber, damaging it. Replace the rubber cover to avoid having discarded food lodge between the cover and the disposal opening, damaging the lip of the disposal's opening over time.

Things You'll Need

  • Hex key
  • Piece of wood or cooking pot
  • Paper towel
  • Replace rubber disposal cover
  • Unplug the garbage disposal from the outlet beneath the sink if your disposal plugs into the wall. Turn off the breaker that supplies power to the disposal if the disposal does not plug into the wall. Leave the disposal attached to the plumbing lines.

  • Loosen the mounting lug located on the garbage disposal's mounting ring. Use a hex key and turn the lug counterclockwise.

  • Grab the disposal in both hands and twist it counterclockwise until it releases from the mounting ring attached to the underside of the sink. Lower the disposal carefully to the floor of the sink cabinet if the plumbing lines are long enough. Sit the disposal on a piece of wood or turn a cooking pot over and sit it on the bottom of the pot if the plumbing lines are too short to sit it on the floor.

  • Pull the old black rubber cover from the top opening on the disposal. Wipe the disposal opening with a paper towel to remove and dirt and grime from around the edge. Push the replacement black rubber cover onto the garbage disposal opening until it snaps onto the disposal.

  • Lift the disposal up and insert it into the mounting ring. Turn the disposal clockwise with both hands until it locks into the mounting ring and no longer turns. Tighten the mounting lug on the mounting ring with the hex key.

  • Plug the garbage disposal in the outlet beneath the sink if your disposal plugs into the wall. Turn on the breaker that supplies power to the disposal if the disposal does not plug into the wall.

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