Problem with Badger garbage disposal. After it was installed, dishwasher wouldn't extract, so we knocked out the plastic "plug." Worked briefly, but then made a loud grinding sound, then a hum. We used tool to turn the gizmo on the bottom -- turned freely both directions. Turned on disposal -- same results (grinding sound then hum). Repeated procedure over and over, same result.

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.

Copy following links to identify problem:
http://waterheatertimer.org/images/Knock-out-250.jpg
http://waterheatertimer.org/How-to-repair-and-install-Garbage-disposal.html#install

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I believe you are talking about the dishwasher knockout.
Just hit it with hammer and screwdriver and then turn disposal upside down to remove the blank, or use a vacuum cleaner hose to **** it out.

I wrote ez disposal replacement step from days I worked apartment maintenance.
http://www.fixya.com/support/r7929008-replace_garbage_disposal

You might be able to buy time filling hole with epoxy or silicone caulk and let dry for 2 days.
10-year old garbage disposal had a good run.
Disposal will need to be replaced at some point.

When I worked apartment maintenance, we replaced disposal with same brand disposal.
That way we didn't have to change out sink basket.
How to: Disconnect p-trap and tailpiece going into disposal.
Rotate connector disk clockwise that holds disposal to sink basket.
Before installing new disposal.
Attach electric wire to new disposal.
Attach dishwasher tube to new disposal. Knock out plug inside dishwasher opening.
Push new disposal up into place, and attach to old sink basket with new connector disk.
Use new connector washer.
Re-assemble tubular pipe.

If this is your home, you want new sink basket that comes with new disposal because it looks shiny and new.
Buy a tub of plumbers putty also.
Remove old sink basket and clean opening.
Put finger-size roll of plumbers putty around sink opening, and then push new strainer basket into plumbers putty.
Tighten basket from below, wipe away excess putty around sink opening.
Install new disposal as described above.


Tips for tubular pipes:
When taking apart tubular pipes, start at p-trap and take apart as few pieces as needed to do job.
On image below, loosen both upper and lower nuts, trap falls loose, and then work on disposal.
Any tubular drain pipe that gets moved while working under sink needs to be disassembled, cleaned and re-assembled.
Metal pipes have rubber washer >> always use new rubber washers.
Plastic pipes have plastic washers > plastic washers can be cleaned and re-used.
Plastic washers have flat side that goes toward nut, tapered side away from nut.



When reassembling tubular pipe, we use rectorseal on washers and joints.
Apply good amount on washer just before pushing washer in place and attaching nut.
Rectorseal will ensure tubular drain pipes won't leak.

There is often a plug in the ISE as many people use them without have a dishwasher connected to them. Quite often it is just a thin plastic membrane that can be knocked out with a screwdriver. There should also be a note to this effect in your installation instructions for the ISE.

It's not guaranteed that your particular model will have a dishwasher drain nipple, but it does, it'll be on the side, near the top of the machine. If the disposer is new you must knock out the plug inside the nipple before connecting a dishwasher. If the disposer doesn't have a nipple, you can get a piece of pipe to fit to the non-disposer side of the sink where you can connect the dishwasher drain hose.

Are you talking about the "barbed attachment" on the disposal? If so, simply use a screwdriver and hammer to knock it out. Make sure you reach into the disposal (through the sink) to get this piece of plastic out after. Good luck

The plug is thin plastic. Use a flat blade screw driver and a hammer to knock it out. I know this sounds primitive but this is how it is done. I have been a plumber for thirty years.

From the dishwasher hose end of the nipple, insert a large flathead screwdriver or nutdriver and tap it with a hammer. They sometimes take a moderatly strong hit. It is litterally nothing but a plastic plug.

You will want to do this with the disposal uninstalled and the power disconected.

(doing it installed can potentially cause leaks.)

Make sure that you remove the little plastic plug that was knocked out from the inside of the disposal.

Turn off the power source to the garbage disposal. Take the drain hose from the dishwasher off the connector going to the disposal (if connected). Insert a flat blade screwdriver in the drain hose fitting and tap a few times with a hammer. The plastic plug will pop off inside the garbage disposal. Reach inside from the top of the disposal to retrieve the plastic plug. Sometimes you have to use a little force to tap the plug out. Hope this helps you.