How to Install a Garbage Disposal in a Double Sink? [Need to Complete 11 Steps]

how to install a garbage disposal in a double sinkHow to install a garbage disposal in a double sink? It is easy to install the garbage disposal in a double sink just need to complete a simple step. The garbage disposal is a kind of device for the kitchen or bathroom sink that grinds up the waste so that it can be washed down in the drain.

I completely installed a garbage disposal in my double kitchen sink. Moreover, the method is also worked in the bathroom. So, if you think that you need to follow a simple process which helps you hassle-free install the garbage disposal, you can stay connected with this article.

How to Install a Garbage Disposal in a Double Sink?

The project may take some extra time because you need to collect some materials and tools before starting to work. Moreover, you need to complete 11-steps and each of the steps is effective for you. So, be patient and complete all of the steps properly.

Tools Need to Collect

  • Hammer
  • Hacksaw
  • Pliers
  • Hex wrench
  • Screwdriver

Materials Need to Collect

  • Silicone
  • A new garbage disposal
  • Plumbers Putty

Step 1: Figure the Garbage Disposal Out First

I think you have already bought new disposal. Are you? If your answer is yes, you should know which things have on the garbage disposal because all you need to install them one by one. It would be better for you to introduce yourself with all of the tools and check that all are coming in the right way.

Step 2: Make Sure That It’s Broken Before Starting Garbage Disposal Assemble

To complete this step, you should focus on three things before removing the old garbage disposal which also helps you to hassle-free install the new garbage disposal. So, let’s get started.

  1. Look at the jam because sometimes it is hard enough to grind such as a piece of glass grinding. If you found it hard enough, you should unplug the disposal.
  2. After that the most important task you need to do turning the motor manually. To do that, you need to use a hex wrench. Take your time and complete the things safely.
  3. Finally, press the rest button. If you found your motor overheated, it would be better for you to wait for 10-minutes so that it can hassle-free reset.

Step 3: Try to Understand Disposal System Anatomy

garbage disposal introduction


It is mandatory for you to understand the disposal system anatomy so that you can comfortably install the garbage disposal. For the double sink, you just need to plumb the disposal so that it can hassle-free discharge tube directly. Note the size should come with 1/4-inches as well as drain properly.

Step 4: Support Garbage Disposal Weight

According to my experience, garbage disposal comes with a 15-lb weight. It may be very complicated for you to hold the garbage disposal in your hand for a long-time that’s why you can use a piece of wood or other things which helps the garbage disposal weight properly.

Step 5: Properly Used the Disposal Cord

You may be surprised to see that you don’t have any cords with your new garbage disposal. Because most of the new garbage disposal cost doesn’t come with a cord. So, if you face the same problem, you should use your old cord.

Step 6: Make a New Discharge Tube

If you think that the old discharge tube doesn’t work properly, you should change the and make a new discharge tube. Simply, you need to measure the old discharge tube (It may long or short which you need to adjust) and make a new discharge tube with the old measurement.

Step 7: Snap Ring

The snap ring you will discover on the sink flange. When you are going to work under the sink, the ring prevents and falls the bracket off. You can use a thin screwdriver to remove the snap ring. Note, that you should carefully remove the snap ring.

Step 8: Sink Flange Weight Down

After you install the new double sink flange, you may be not able to shift around when you’re assembling the parts underneath. Moreover, you need to break down the seal between the flange and the sink because of installing a new garbage disposal in your double sink.

Step 9: Tight with Your Pliers

When you are going to hang new disposal, rotating the lower mounting ring tightens between the flange and the sink. You can use pliers to tighten the flange so that it can easily hold the weight and you can use the flange in your double sink for a long-time.

Step 10: Used Seal

The majority of the plumbers strongly believe that sealing the sink flange to itself. I would love to suggest you use a silicone seal because of its durability and lasting use. When you use the silicone seal the leak issue solves 100%.

Step 11: Check Out for Leakage

I think you have already done your work and you can hassle-free use the garbage disposal sink. But, it would be better for you to check out the whole process again because of checking out leakage problem.

FAQs (Frequently Ask Questions)

Q: How do you plumb garbage disposal with two sinks?

Answer: You can plumb your garbage disposal with two sinks as well as a double sink. However, you need to complete a simple process to plumb the garbage disposal which I discuss in the above section.

Q: Where does the garbage disposal go in a double sink?

Answer: According to my experience, the garbage disposal goes in the small bowl in a double sink which you need to connect and assemble with the flange. I hope that you may clear your confusion.

Q: Does a dishwasher need garbage disposal?

Answer: When you are going to connect new garbage disposal to a double sink, it is not essential for you to use the dishwasher. You can assemble the garbage disposal without using a dishwasher.


Installing a garbage disposal in a double sink is not a tricky task even if you are a new person to do the job. I just explain which things I do on this project. I hope that the whole article is clear to you and you can hassle-free install the new garbage disposal in a double sink.

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