How to knock out garbage disposal plug

If you recently replaced your garbage disposal make sure the "knock out" plug was punched out to allow drain water into the disposal. The guy who replaced my disposal forgot to do it and my dishwasher would not empty. It's an easy fix. Just remove the drain hose from the dishwasher that attachs to your garbage disposal. Look inside with a flashlight and you will see if it is still there.

If it is, take a hammer and screw driver or punch and knock it out. TURN OFF POWER to your disposal and you can retrieve the "knock out" plug (piece of plastic about the size of a dime). Replace your drain hose to the disposal and try your dishwasher again. Worked for me! Good luck.

see this causes and proceed according. God bless you
Belt, Water Pump Although few dishwashers have a water pump belt, if the dishwasher won't drain there might be a worn or broken water pump belt. After removing the lower kick panel the motor can be seen in the front, the water pump belt is on the bottom of the motor.

Drain Pump If the dishwasher won't drain, the drain pump might be defective. Test the pump motor with an Ohm meter. Drain pumps are not repairable, if it's defective it will need to be replaced.

Drain Impeller The drain impeller is attached to the pump and pushes the water out of the dishwasher, through the drain tube and into the garbage disposer or drain line. If the dishwasher won't drain, the drain impeller might be broken or worn out. Replace both the impeller and seal at the same time.

Drain Solenoid Kit If the dishwasher won't drain, the drain solenoid kit might need to be replaced. The drain solenoid is an actuator that opens a flap to allow the water to drain.
Drain Valve The drain valve can get clogged with debris and should be cleaned out if the dishwasher won't drain. If it seems clear of debris but won't actuate, it will need to be replaced. The drain valve is not repairable Pump and Motor Assembly If the dishwasher won't drain, the pump and motor assembly might be defective. If the motor runs during the drain cycle, check for a blockage in the drain line. If the motor won't run during the drain cycle or if it just hums when it should be running, the pump and motor assembly might need to be replaced.

Clogged or Improperly Installed Garbage Disposer If the dishwasher won't drain and the garbage disposer was installed recently, the installer might have forgotten to knock out the drain plug from this disposer. All garbage disposers are sold with a solid plug in the drain tube for situations where a dishwasher isn't connected. However, if the dishwasher is connected, the plug will need to be removed. If the disposer wasn't replaced recently, remove the dishwasher drain hose from the disposer and clean out both the fitting on the disposer and the end of the drain hose. These are the most common places to find an obstruction if the dishwasher won't drain.

Clogged or Improperly Installed Garbage Disposer If the dishwasher won't drain and the garbage disposer was installed recently, the installer might have forgotten to knock out the drain plug from this disposer. All garbage disposers are sold with a solid plug in the drain tube for situations where a dishwasher isn't connected. However, if the dishwasher is connected, the plug will need to be removed. If the disposer wasn't replaced recently, remove the dishwasher drain hose from the disposer and clean out both the fitting on the disposer and the end of the drain hose. These are the most common places to find an obstruction if the dishwasher won't drain.

Check Valve If the dishwasher won't drain the check valve might be stuck closed. The check valve is a small plastic device which prevents water from returning to the dishwasher after it has drained. If the valve gets stuck closed, it will prevent the water from draining. The check valve is the device that the drain hose is attached to on the dishwasher.

Check Ball If the dishwasher won't drain the check ball might be stuck. The check ball is a small plastic ball in the check valve which prevents water from returning to the dishwasher after it has drained. If the ball gets stuck, it will prevent the water from draining also. The check valve is the device that the drain hose is attached to on the dishwasher.

Check sink drain and drain hose for restriction
Check the drain valve
Check the drive belt
Test the timer motor
If you have a brand new dishwasher or garbage disposer, check the knock out plug on the garbage disposer.

Before attempting any testing or repairs unplug the dishwasher or shut off the power.

Water does not drain from the dishwasher:

• Check sink drain and drain hose for restrictions
• Unjam the motor
• Unjam the pump
• Check the drain valve
  
• Check the drive belt
• Test the timer motor
  
• If you have a brand new dishwasher or garbage disposer, check the knock out plug on the garbage disposer.

Look where the drain hose attaches to the garbage disposal. Make sure the knock out plug has been removed.

If water does not drains please check the following :

• Check sink drain and drain hose for restrictions
• Unjam the motor
• Unjam the pump
• Check the drain valve
• Check the drive belt
• Test the timer motor
• If you have a brand new dishwasher or garbage disposer, check the knock out plug on the garbage disposer.

I'm pretty sure the "air hose" is the drain hose from the dishwasher and is supposed to empty in the garbage disposal. Garbage disposals are made for this optional hook up with a plug you have to knock out and remove from the inside of the disposal. If you run the dishwater with the hose not connected to disposal it has to be going somewhere!

• Check sink drain and drain hose for restrictions
• Unjam the motor
• Unjam the pump
• Check the drain valve
• Check the drive belt
• Test the timer motor
• If you have a brand new dishwasher or garbage disposer, check the knock out plug on the garbage disposer.

remve the drain line connected to the garbage disposal take a flat blade screwdriver insert it into the garbage disposal and hit the end of the screwdriver , the plug will pop out
to verify after hitting it stick the screwdriver back in if it has not removed the plug do it again

It sounds like you have connected your dishwasher to a garbage disposal.

1. The 2 hoses provided with your dishwasher connect together.
2. You run the drain hose through a hole in the bottom/back of your cabinet, then up to the top of the cabinet, then connect it to the drain on the garbage disposal. (The reason that you run your drain up to the top of the cabinet is: This is called an air gap, and helps keep a little water in the drain line, which will prevent sewer gases from entering your dishwasher.)
3. Be sure to knock the plug out of the drain of the garbage disposal. A garbage disposal is designed to work with or without a dishwasher. The plug is in the center of the drain. The best way to knock this plug out is to pull the garbage disposal, and with a flat screwdriver, knock the plug out.
4. Then remove the plug from the disposal. Reinstall the disposal.
5. Install the drain hose. The drain hose will connect right up to the disposal using the clamp provided with the dishwasher.
   

This should help you. If not please attach more info.

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