How To Stop Disposal From Backing Up Into Other Sink

If you have the garbage disposal you probably already experience this problem because clogging is quite normal for garbage disposal. But aside from clogging you may have noticed the backing of the sink every once in a while.

How To Stop Garbage Disposal Backing Up

The challenge is that people don’t know the reason for the backing of the sink. But its often merely because of clogs. Sometimes the clog is so extensive that every time you clean, you have with inconveniencing dirty water and smell in the other sink.

You know how hard it is to clean this mess, but then if you leave it out there, you risk spreading germs in the house. This often means that the clog has gone deep into the drains. So, with this article, we will show you some things that cause it.

Why Does Backing into The Sink Occur?

So, now that we all know that the sink is clogged; let’s find the reasons why you would have the block on one side of the sink.

Using the disposer for the wrong reasons

If you misuse the disposer, it’s bound to clog. Don’t be those people who use garbage disposal much like the trash can. If you keep putting anything into the garbage can, it will for sure clog.

And if you don’t do away with the clog sooner, it will just be a matter of time before you notice the sink backing.

  • Below are the items to avoid putting into the disposer

Don’t put any fibrous foods in the garbage disposal, no fats, and grease, eggshells, coffee grinds, bones but most especially non-food items.


If you don’t thoroughly clean the garbage disposal it will only be a matter of time again before it starts to back up. For the proper maintenance, you should at least clean the disposer once in two weeks.

The clogs

Sometimes the clog may be so bad that it has gone into another drain line. So instead of allowing the water out of the sink, it stops it at the clog and it, therefore, drains back.

Wrong installation

Sometimes you may have the installation problem. This is where you made a faulty installation and therefore, it leads to the backing.

Now even with this reason, you can correct the problem.

How to Stop the Backing Up?

There are various methods you can use to unclog the sink. But first, always remember to switch off the power before you begin anything. It will keep you safe from any accidents. Turn off the circuit breaker or unplug it from the wall power source.

Using the plunger

Using the plunger

If you have the kitchen sink plunger, the first step is to try and see if that will work.

To begin with, fill the sink that’s opposite to the garbage disposal with water. Let at least three to four inches of water into that sink. But if the sink has some water already, that’s fine though make sure its just three to four inches.

Confirm that the garbage disposal drain is plugged in. Now plunging is so easy, you need to set the plunger in the middle of the opposite sink that you fill with water.

Pump it rapidly for about 20 seconds and then pull to check if the water is draining. If you pump it right, you will feel a suction between the plunger and the sink. Keep plunging, and in a minute or two the clog will loosen.

If it still is clogged, plunge the other sink with the garbage disposal as well. Do it several times and if it doesn’t help give it a few minutes to see if it’s even beginning to drain. Next, repeat the process once more. If your water is still stuck then there’s a clog deep into the drain.

If it clears, run some cold water in the sink and then plug the disposer and clean it thoroughly.


Always use a seal on either side of the sink. If say you are plunging the opposite side of the sink, sea the garbage disposal side.

Also, block the dishwasher drain to avoid the mess from the dirty water going back to the dishwasher.

Use the snake drain

If the plunging method doesn’t work, you will need to use the snake drain.

To begin, place the bucket under the sink this will help you to collect the dirty water as well as clog debris. But first, get rid of anything you often store beneath the sink.

snake drain

Get the pliers to help you loosen the drain trap. Once you remove it, set it aside. This will make it easy to remove the elbow like pipe. Check it out to confirm that it doesn’t have clogs. At this time though clean it of the debris collected on the inside.

debris collected on the inside

If it has no clog, reattach it. Go to the next process. Take out the tailpiece that is connected to the sink drain and its vertical to confirm that it doesn’t have a clog. Finish off by removing any form of debris then clean the tailpiece. Like the elbow-like pipe reattach it.

How to snake drain

From here, you should be ready to go deep into the trap to find the clog because clearly, it’s not in the other parts. This is when the snake drain comes in handy. Now this will get you through the pipe connecting you to the back wall.

So, let’s go, take your drain snake and insert in the drainpipe, then using the handle of the snake drain, crank it in a clockwise motion. Go on cranking and if you feel an obstruction crank through it.

Pull the crank out by cranking counterclockwise as you pull

Pull the crank out by cranking counterclockwise as you pull. Remove the clog and clean the snake drain with water. Repeat the procedure a few more times until there’s no more obstruction.

Next, reattach everything to place and run cold water into the sink to give it a thorough clean. Alternatively, use the hot water to clean it on both sinks. You can add some dish soap.

The moment you notice this problem, you should clear it soon. If you don’t remove the clog, it will quickly begin to smell. Remember this is dirty water from the food waste. It shouldn’t be a complicated process, though.