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Home»Dishwasher»How To Cap Off Dishwasher Drain On Garbage Disposal?
Dishwasher

How To Cap Off Dishwasher Drain On Garbage Disposal?

Sujon AhmedBy Sujon AhmedJune 17, 20256 Mins Read
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People often get confused if it is possible to cap off dishwasher on the garbage disposal. Many people are curious to know about it.

Knowing if it is possible to do this is necessary to not go wrong and get the best cleaning experience.

Read this article to find your answer and a detailed guideline for a safe and simple dishwashing experience.

How To Cap Off Dishwasher Drain On Garbage Disposal?

It is possible to cap off the dishwasher drain on the garbage disposal. It can be done by using an ordinary conical ¾ inch wider( on its wider side) rubber plug.

Push the rubber cap simply into the drain hole to cap it. To tighten the rubber cap, use a hammer and tap gently.

Using A Rubber Plug To Close The Drain

Here’s how to use the above conical rubber stopper to seal up the drain connection:

The following is a step-by-step procedure for capping off the dishwasher drain hole:

  1. Switch off the waste disposal and dishwasher. Ensure that both plumbing appliances are entirely emptied.
  1. Place a bucket beneath the sink and unplug the dishwasher. A clamp is used to secure the dishwashing hose.
  1.  Using a screwdriver or a plier, loosen this clamp. Twist the hose to and fro to easily remove it after the clamp is released.
  1. Put the rubber plug into the trash disposal’s dishwashing intake with the smaller face facing in. 
  2. Insert the stopper entirely into the drain hole. If required, use the side face of a hammer.
  1. Check for leaks and run the garbage disposal with lots of water.
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Using a Dishwasher Connector Kit and a Copper Cap to Close the Inlet

As previously stated, a rubber plug is the simplest way to close off a disposal’s dishwashing intake.

 Another option is to use a dishwasher hookup kit and a 1/2-inch copper cap.

Here’s how you do it:

  1. Loosen the clamp on the dishwashing hose and remove it from the waste disposal. Keep a pail beneath it to capture any remaining water in the hose.
  1. Cut the dishwasher connection to the proper length. 
  1. Insert the copper cap into the connector and secure it using the kit’s clamp.
  1. Connect another end of the connector to the trash disposal’s dishwasher inlet.
  1. Lastly, ensure that the connection with the clamp is firmly tightened.

What Is the Dishwasher Inlet Used For?

The dishwasher inlet on the garbage disposal connects the dishwasher outflow hose to the removal. 

This is done to avoid dumping the dishwasher straight into the drain pipes by draining it through the garbage disposal.

There are two reasons for this. Suppose the dishwasher is directly connected to the drain. 

In that case, backwater will flood the dishwasher and cupboard because there is no other way for water to flow. 

However, when the dishwasher is drained through the waste disposal, the waste disposal is drained into the sink, and the reserve water fills the sink. 

By connecting the dishwasher to a waste disposal system, you can prevent heavy, dirty floods in the kitchen and subsequent tedious cleaning. 

Dishwasher drainage contains leftover food. When the dishwasher is emptied by the garbage collector, the garbage collector catches large leftovers. 

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The leftovers will later be crushed and discarded. However, if the dishwasher is drained directly into the drain, those foods can become clogged. 

The drain size of this waste disposal dishwasher is 7/8 inch in outer diameter. You can use the dishwasher connector kit to connect hoses of various sizes.

How Do You Remove A Garbage Disposal’s Knockout Plug?

As previously stated, all trash disposal models include a dishwasher input. This intake is closed off with a plastic knockout plug. 

If you want to connect a dishwasher to it, you must first unplug it. It is simple to remove this:

  1. Find the dishwasher inlet. It’s on the same side as the garbage disposal.
  1. In the intake hole, insert a screwdriver and carefully tap it with a hammer. Do not hit it too hard since this will penetrate the plug rather than remove it.
  1. The knockout plug will become lodged within the garbage disposal. Using a flashlight, locate it and remove it with a needle nose plier.

How do I remove the knockout plug from the garbage disposal? 

As mentioned earlier, all waste disposal models have a dishwasher entrance. This inlet is sealed with a plastic knockout plug. 

If you want to connect the dishwasher, you must first remove this plug. Easy to remove. 

 Find the entrance to the dishwasher.

 It is on the same side as the disposal site. Insert the screwdriver into the air intake and tap it with a hammer. Please do not hit hard. 

Instead of knocking out the connector, it pierces it. Knockout plugs end up in garbage disposal. Find it with a flashlight and remove it with needle-nose pliers.

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Frequently asked questions

Is It Necessary To Drain The Dishwasher After Using The Garbage Disposal?

A dishwasher does not have its own drain as part of the plumbing system in your home.

It instead drains via the garbage disposal.

This includes any food residue wiped off the plates and bowls during the cleaning operation. 

Problems with the disposal, such as sluggish draining or clogging, might impact the dishwasher.

How To Cap Off Dishwasher Drain On Garbage Disposal?

A simple conical rubber stopper 3/4 inch wide on its widest side may be used to plug the dishwashing drain on the garbage disposal. 

To close the drain hole, just insert the rubber stopper. You may also lightly hit it with a hammer to tighten it up.

Are The Dishwasher And Garbage Disposal Linked?

The dishwasher is linked to the garbage disposal pipes because there is no plumbing line.

Final words:

Nothing  prohibits the dishwasher drain from connecting  directly to the underfloor drain, but doing so creates a number of potential problems. 

Next, the drain pipe should be connected to a proper fitting with a siphon that prevents the waste gas from flowing back into the dishwasher.

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Sujon Ahmed
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