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Why does my kitchen sink back up when I run the garbage disposal? If you have a garbage disposal, you may have a clogged drain line. The water will back up in the sink, and this water contains food scraps. In addition to clogging your drain line, it could also cause other plumbing problems. To fix the problem, you should first clean out your garbage disposal with ice and vinegar, or baking soda.
 

Unplug the garbage disposal

 
Next, unplug your garbage disposal. It may be plugged in or overheated. If this is the case, you can try resetting it with the reset switch. Rebooting the garbage disposal should clear the clog. If this doesn't work, call a plumber. Otherwise, you can try the above methods. But if you can't get rid of the problem on your own, a professional plumber is a better option.
 

 
In addition to the garbage disposal, you can also try using a plunger. Using the plunger, you place the plunger over the drain and pump it up and down several times. If this doesn't work, you should remove any remaining food that may be blocking the drain. If that doesn't work, try running the garbage disposal again and see if the water drains. If the problem persists, you may need to reset the garbage disposal.
 
If you can't fix the drainage problem on your own, it may be time to call a plumber. A blocked drain is a sign of a more serious problem, and you should call a plumber immediately. The first step is to turn on your garbage disposal. If this doesn't work, try using an Allen wrench to loosen the blades and use a plumber's snake to clear out the drain.
 

 

Turn off the water

 
If the problem persists, try using a plunger or flashlight to remove the visible clog. If you still don't get rid of the problem, you can use vinegar and baking soda to help break down the debris. Be sure to leave the mixture for at least 30 minutes before flushing it down the drain. Once you've done this, make sure to turn off the wall switch and turn off the water to run the disposal again.
 

Clean the P-trap

 
Another reason why your kitchen sink is backing up is a double drainpipe. The two sink bowl drains share the same drainpipe. This means that if one is clogged, the other sink will be blocked too. If your kitchen sinks drainpipe is clogged, you can unclog it using a half-cup of baking soda and 1 cup of white vinegar. If the problem persists, you may want to clean the P-trap to prevent the clogged sink from coming back up again.
 
A clogged drainpipe can also be caused by a buildup of food scraps and larger items. These items collect in the drain pipe and can eventually block it completely. This can be annoying and even dangerous because not only does the sink not drain, it can cause water and food to back up into the drain. A clogged drain can also odor bad. The clogged drainpipe can even lead to a flood of sewage.