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On the side of the disposal, there is a tube, 1/2 inch diameter and 1 1/2 inches long. This is for the discharge line from a dishwasher. The knock out plug in in that tube. If you do not have a dishwasher, you leave the plug in so that the disposal will not leak. Having the dishwasher empty into the disposal helps keep it clean and free of food particles.

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Q: What is a knockout plug for a garbage disposal?
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Why is my dishwasher draining out of the drain air gap?

The rubber hose leading from your airgap to your garbage disposal or drain pipe is propably plugged. Remove hose and clean or replace. Also, when you remove the hose leading from the airgap to the garbage disposal, check to ensure that your stopper plug is removed from the garbage disposal. The stopper plug is a metal or rubber plug placed in the garbage disposal for people that don't have a dishwasher. The best way to remove this plug is by taking a screwdriver and placing it on the plug and gently tapping the butt of the screwdriver with a hammer until the plug pops out. Use metal fingers to remove the plug from the upper hopper chamber of the garbage disposal or (if you are daring enough) remove with your hands.


Should raw cabbage leaves be put in the garbage disposal?

Raw cabbage leaves should not be put into the garbage disposal as it will badly plug up the disposal. Other items that should not put into the garbage disposal include banana peels, onion skins and celery.


Should an electrician install a new garbage disposal?

More like a plumber. The new disposal should have a plug end on it to plug into a wall outlet


How do you remove the knockout plug in a garbage disposal?

Punch out plug through drain opening on outside of disposal with screw driver or whatever will fit into opening to allow you to break out plug. Tap on screwdriver or whatever hard enough to break out plug. Remove plug from inside of disposal.


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When was Garbage disposal unit created?

Garbage disposal unit was created in 1927.


When was the garbage disposal invented?

John W. Hammes invented the garbage disposal in 1927.


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I would like to get a better garbage disposal system. Where can I find online the best garbage disposal solution?


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can you replace the tube that comes from the garbage disposal if it leaks underneath.


Is it easy to install garbage disposals into sinks?

Yes. To install a garbage disposal into a sink you really only need a few things. First, make sure that you have an electrical outlet to plug the garbage disposal into. If you have this along with all of the plumbing materials to hook up your drain pipe you can install it very easily.


What are the causes of improper garbage disposal?

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Are you supposed to run water while using the garbage disposal?

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