How To Install A Garbage Disposal In 9 Easy Steps (Guide) (2022)

If you have a garbage disposal, you probably rely heavily on it to handle a ton of waste. They’re the best, aren’t they?

Garbage disposals are great because they keep your pipes clear and your garbage fresh by not housing stinky food scraps. If you don’t have one, you’re in luck because we’re going to show you how to install a garbage disposal in 9 easy steps.

What Type of Garbage Disposal Should I Get?

How To Install A Garbage Disposal In 9 Easy Steps (Guide) (1)

(Video) How to Install a Garbage Disposal | Ask This Old House

First things first, you need to know which type of garbage disposal you plan to install. There are actually two primary types of garbage disposals: continuous feed and batch feed disposals. Both work great but can perform differently depending on how you use them.

  1. A continuous feed garbage disposal is probably what you’re most familiar with. It can accept waste and water continuously but will only blend and dispose of waste when the switch is turned on. Then, you must turn the switch off to end the cycle.
  2. On the other hand, a batch feed garbage disposal only runs when a stopper is placed over the top. This type of garbage disposal is absolutely ideal in homes with children to avoid any foreign items falling down the disposal, or forbid that, hands being near it when it’s running.

You will also want to consider the size of the disposal you install. Some disposals are really big and may not fit under your sink. So when you go to the hardware store or start researching garbage disposals, make sure you have measured how much space you have under your sink—considering where your pipes are.

What Do I Need to Install a Garbage Disposal?

How To Install A Garbage Disposal In 9 Easy Steps (Guide) (2)

Your new installation will probably go much easier if you have an existing garbage disposal. This is because you’ll simply be disconnecting the old one and reconnecting a new one. But if not, you will need a few things to get started.

  1. You need to have access to a plug-in under your sink. This might be something you need to get wired in your kitchen as it’s not always standard for an outlet to be under the sink, especially in older homes. You can hire a licensed electrician to do that for you before you begin.
  2. You need to attach the disposal under your sink and hook up the hose to run wastewater through. This can be a little tricky, but it’s not impossible, even if you’re not an experienced plumber.
  3. You need to have some tools and materials to help you get the job done safely and effectively.

These tools include:

  • A screwdriver
  • A disposer wrench
  • A hacksaw
  • Water pump pliers
  • Bucket and rags
  • Plumber’s putty
  • Electrical cord
  • Safety supplies, including goggles and a dust mask
  • Your new disposal and hoses

How to Install a Garbage Disposal: 9 Simple Steps

Now to the fun part; a step-by-step guide on how to install a garbage disposal. If you follow these steps, you’ll be chopping up food waste in no time!

(Video) Install Garbage Disposal Step-by-Step, 3-bolt or EZ Mount, Comprehensive Guide Part 2

Step 1: Read Your Owner’s Manual Thoroughly

This is probably the most crucial step. The owner’s manual for your disposal will have all the information you need to install it, including what tools and materials you’ll need, as well as specific instructions for your model. Reading it beforehand can ensure you don’t miss any steps along the way.

Step 2: Remove Existing Disposal (If Applicable)

If you already have a garbage disposal in your sink, you’ll want to start by disconnecting it. But before that, turn off the power at your circuit breaker and turn off your water shut-off valve. Start by unplugging the power source then disconnecting the drain flange. Just hold it with one hand and turn it counterclockwise to remove it from the sink. Then, use pliers to unscrew the hose clamp from the discharge pipe.

Step 3: Wire Your Disposal

How To Install A Garbage Disposal In 9 Easy Steps (Guide) (3)

This step may depend on whether your disposal comes with a power cord or not. Sometimes they do not, so it will need to be wired either with the old power cord from your existing disposal or a newly purchased one.

There is a small plate on the bottom that you can remove to reveal the capped wires to wire your disposal. Most cords and disposals will have the same standard colored wires. You should follow the manufacturer’s instructions for this, but in general, you’ll connect black to black, white to white, then the green wire connects to the ground screw.

Step 4: Install the Drain

You’ll want to remove the existing drain flange and replace it with a new one for your disposal. Pry it up gently, then remove any old plumber’s putty. Then, replace it with your new drain flange by first putting 1/4 inch of new putty around the underside and pressing snugly into the drain hole.

(Video) Replace InSinkErator Badger with Badger Disposal

To keep it in place, put a towel or pad down and then a weight to hold it down. Or have a friend or family member apply pressure as you work underneath to mount the garbage disposal.

Step 5: Place the Mounting Ring Underneath

There are actually two types of attachments for garbage disposals. You’ll either have an EZ Mount or a 3-Bolt Mount. Both are simple enough to install, but the mounting ring would be different for each.

To install your mounting ring, follow these steps:

  1. Align the rubber gasket between your drain flange and mounting ring.
  2. Tighten your fasteners on the mounting ring, so they are snug but not too tight.
  3. Keep going until the mounting is snug against your gasket for a watertight seal.

Step 6: Mount Your Disposal

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Now, you’ll want to carefully lift your disposal up to attach it to your sink mounting assembly. Secure it by turning it into place, connecting the snap ring, then tightening the appropriate fasteners.

Step 7: Attach the P-Trap and Drain Hose

Next, you must attach it to the P-trap, drain hose, or dishwasher hose. You may not have all of these, but it’s pretty straightforward, and you can see a walk-through in the video down below.

(Video) How to Install - Insinkerator Evolution Select Garbage Disposal

If you want your dishwasher to drain into the garbage disposal, you will need to carefully pop out the plugs on the side with a screwdriver and hammer. LEAVE THE PLUGS IN if you do not have a dishwasher hose to connect to.

Step 8: Double-Check Fasteners and Plug In Your Disposal

Ensure your disposal is securely in place, and the drain flange is flush on the top.

  1. Secure all mounting screws to be snug but not too tight.
  2. Remove excess plumber’s putty from the top of your drain.
  3. Plugin the power source to your disposal.
  4. Turn the power and water back on.

Step 9: Test it Out

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Now you get to test it out! Keep a bucket underneath your garbage disposal if there is a leak somewhere when you run the water. Go ahead and run some water for a few seconds (up to a minute) and flip the switch to the disposal. If it looks good with no signs of leaks or weird sounds, go ahead and try busting up some food scraps.

When In Doubt, Call the Pros

If you are worried you might not be installing your garbage disposal correctly, it could be time to call in a professional plumber. When in doubt, it is best to hire a professional to ensure everything is connected properly and there are no leaks in your new system.

Paladin Plumbing has a reputation of excellence for both plumbing and customer service. We can repair or replace your garbage disposal with ease and be a resource for you to maintain it moving forward. If you are having trouble with your garbage disposal, give us a call today! We would love to help.

(Video) How to Install insinkerator Garbage Disposal Power Cord - FAST & EASY


Can I install a new garbage disposal myself? ›

Garbage disposal installation is a straightforward process, especially if you follow all steps and all garbage disposal parts are in working order. As long as you use the garbage disposal for getting rid of the recommended types of waste, it will help your kitchen look its best.

What are the stages in a garbage disposal? ›

1-Stage: Many disposers feature only one stage of grinding, where food is ground once before passing through drain pipes with water. 2-Stage: Grinds food in two stages to achieve a finer grind. The second stage of grinding virtually liquefies food waste, allowing for more types of difficult foods to be ground.

What is the first step of garbage disposal? ›

The very first step in the management of waste disposal is the collection of waste. The accumulated waste heaps should be first sorted out and separated. For example, Dry waste, Wet waste, plastics, paper waste etc, every type of waste should be separated out according to the nature of the waste product.

How do you put a garbage disposal in a sink? ›

How to Use your Garbage Disposal Properly
  1. Always use your disposal with running water. ...
  2. Only use cold water with your disposal. ...
  3. Don't overload your disposal. ...
  4. Make sure to fully grind all waste. ...
  5. Remove small objects from your sink before use. ...
  6. Avoid grinding waste that will clog or damage your unit.

What is the easiest garbage disposal to install? ›

For a workhorse garbage disposal that's powerful, easy to install, and quieter than the competition, the InSinkErator Evolution is our favorite. For a great budget pick, the Waste King L-111 is also easy to install, fairly quiet, and compact.

How much should labor cost to install a garbage disposal? ›

Labor costs: A handyperson charges $50–$75 per hour to install a garbage disposal. A licensed plumber may charge up to $150 per hour.

What tools do I need to install a disposal? ›

  • Replacement Garbage Disposal.
  • Electrical Cable Connector.
  • Screwdriver.
  • Plumber's Putty.
  • Hammer.
  • Needle Nose Pliers.
  • Wire Nuts.
  • Wire Stripper.
20 Dec 2011

How long does it take to remove and install a garbage disposal? ›

On average it takes between two and four hours for a professional installer to install a new garbage disposal. This includes taking measurements to position the disposal, removing pipes, installing the disposal, and fitting new pipes to make the whole system work again.

Does adding garbage disposal add value to a home? ›

Installing new fixtures can make your entire kitchen look newer, and adding features like an on-tap water filter or new garbage disposal will increase the value for prospective buyers who are looking for those features and want to avoid a post-sale renovation.

What are the 8 common methods of waste disposal? ›

You will find there are eight major groups of waste management methods, each of them divided into numerous categories. Those groups include source reduction and reuse, animal feeding, recycling, composting, fermentation, landfills, incineration, and land application.

What are the 5 methods of waste disposal? ›

5 Waste Disposal Methods You Need To Know
  • Recycling.
  • Plasma Gasification.
  • Composting.
  • Incineration.
  • Sanitary Landfill.

What are the 7 steps to cleaning a garbage disposal? ›

7 tips to clean your garbage disposal
  1. Remove any obstacle: Before you start cleaning, make sure there is not something stuck in the sink and drain area. ...
  2. Scrub the Baffle and Disposal Opening: ...
  3. Hot water and dishwashing soap: ...
  4. Baking soda and vinegar: ...
  5. Ice cubes and salt: ...
  6. Bleach: ...
  7. Citrus Peels:

What are the 6 methods of disposal? ›

The various methods of waste disposal known are as follows:
  • Landfill.
  • Incineration.
  • Biogas Generation.
  • Composting.
  • Waste compaction.
  • Vermicomposting.

What are the 10 strategies that can be done to manage waste properly? ›

Wastes to be recycled or reused should be collected in separate bins at source to avoid contamination.
  • 1.3. Reduce. This involves the reduction of wastes at the point of generation or before final disposal [12]. ...
  • 1.3. Reuse. ...
  • 1.3. Recycle. ...
  • 1.3.4. Composting. ...
  • 1.3. Energy recovery from solid waste.

What are the 3 proper waste disposal? ›

Exploring the three Rs of waste management — Reduce, Reuse, Recycle. In order to keep as much material out of the landfill as possible, it's important for each of us to do our part. One of the ways to put that plan into action is through the 3 Rs of waste management — Reduce, Reuse, Recycle.

Do you need plumbers putty to install a garbage disposal? ›

Plumber's putty is typically recommended for sealing the sink flange to the sink itself, but silicone will provide a more reliable seal. With silicone, there's almost no chance-now or later-that the flange will leak.

What is the best disposal method? ›

Recycling is one of the best methods of disposal simply because it goes a long way to preserving the environment. There are so many materials you can recycle starting from metals, PVC, PP, LDPE, glass, etc.

Do all garbage disposals fit all sinks? ›

A garbage disposal is used in kitchen sinks to process food wastes. They are housed in the cabinet under the sink, connected between the drain and the trap. All garbage disposals are made to fit all kitchen sinks since all kitchen sinks have standard drain hole sizes of 3.5 to 4 inches.

Do plumbers like garbage disposals? ›

Having a garbage disposal unit installed in your home is a great idea, any plumber would highly recommend doing so because it is an effective way to deal with common kitchen waste such as uneaten food by shredding them into small pieces. As a result they can easily pass through plumbing.

How many years does a garbage disposal last? ›

Most disposals have a life expectancy of about 10 years, after which they may start clogging more often.

Who should install a garbage disposal? ›

Why You Should Call a Plumber for Your Garbage Disposal Problem. Plumbers will be the most effective when it comes to resolving your garbage disposal issue. Most likely a plumber installed your garbage disposal, and they have the knowledge to solve most issues, even electrical ones.

How do I know what size garbage disposal to buy? ›

When deciding how to choose a garbage disposal, consider the foods you'll be disposing, the volume you'll be disposing, and compare that to the horsepower rating of your unit. If you're providing limited service and just grinding up fruits and vegetables, you should use a disposal in the 1 hp or less range.

What is the most common method for disposal? ›

Landfills: Throwing daily waste/garbage in the landfills is the most popularly used method of waste disposal used today. This process of waste disposal focuses attention on burying the waste in the land.

Does a garbage disposal ever get full? ›

Disposals also can back up over time because the waste line or trap gets coated and eventually obstructed with food waste. If your garbage disposal is draining very slowly or not at all, the problem is most likely in the drain trap—the U-shaped plumbing fitting that is located downstream of the disposal discharge pipe.

How much does it cost to install garbage disposal and sink? ›

$350 to $600

The price includes the disposal itself, installation labor, and in some cases, extra wiring. You'll need a slightly different garbage disposal if your wastewater is handled by a septic system.

What happens after garbage disposal? ›

Your trash goes to a landfill where some of it is sorted in to recyclable bins and some of it is dumped into the landfill. While the recyclables go one way, the landfill is plowed under and intro soil and previous deposits. As the landfill decomposes, methane and related gases leaches out into a landfill-gas-to-energy.

How much does Lowe's charge to replace a garbage disposal? ›

Lowe's – The garbage disposal installation cost from Lowe's is $104, which is slightly more affordable than the same service from Home Depot. Combined with the additional cost of the garbage disposal unit itself, homeowners can expect to pay a total of approximately $265 for parts and labor.

Is it easy to remove a garbage disposal? ›

Removing a garbage disposal may seem intimidating, but it's a deceptively easy DIY job.

Is it OK to not have a garbage disposal? ›

They are convenient in the sense that they are useful for eliminating certain kinds of food waste. That said, having a garbage disposal isn't necessary. It is a convenience more than anything else. If you have one and it breaks, you might not want to invest in replacing it.

What brings the most value to a home? ›

What Home Improvements Add the Most Value?
  • Kitchen Improvements. If adding value to your home is the goal, the kitchen is likely the place to start. ...
  • Bathrooms Improvements. Updated bathrooms are key for adding value to your home. ...
  • Lighting Improvements. ...
  • Energy Efficiency Improvements. ...
  • Curb Appeal Improvements.
24 Mar 2020

Is a waste disposal worth it? ›

The Benefits of Waste Disposal Units

In actuality, disposal units are much more environmentally sound than simply throwing your leftovers into a landfill. Decomposing foodstuffs give off methane gas, which pollutes the air and contributes to the growing problem of greenhouse gasses.

Do I need plumbers putty to install a garbage disposal? ›

Plumber's putty is typically recommended for sealing the sink flange to the sink itself, but silicone will provide a more reliable seal. With silicone, there's almost no chance-now or later-that the flange will leak.

Do both sides of the sink go to the garbage disposal? ›

Typically, both sides of a double basin sink drain separately. Often one side drains into the garbage disposal while the other drains downward, but the two separate drains intersect at the main drainage line. This is where you may find the source of your clog.

Which garbage disposal is easiest to install? ›

For a workhorse garbage disposal that's powerful, easy to install, and quieter than the competition, the InSinkErator Evolution is our favorite. For a great budget pick, the Waste King L-111 is also easy to install, fairly quiet, and compact.

Does it matter which side of sink to install garbage disposal? ›

Selecting a Side for the Garbage Disposal

This is an important decision as it cannot be changed once installed and the ergonomics of your kitchen add to its lifetime value for you and your family. To put it simply, it is your choice which side you'd like it to be installed.

What holds a garbage disposal in place? ›

Install the Drain Fitting and Mounting Ring

To install the garbage disposal, you first need to install the assembly that will hold it in place beneath the sink. This is a special form of drain fitting that consists of a sink flange and mounting ring that sandwiches around the top and bottom of the sink drain opening.

What do plumbers think of garbage disposals? ›

Having a garbage disposal unit installed in your home is a great idea, any plumber would highly recommend doing so because it is an effective way to deal with common kitchen waste such as uneaten food by shredding them into small pieces. As a result they can easily pass through plumbing.

Why does my garbage disposal water comes up in the other sink? ›

One of the most common causes of garbage disposal backing up into another sink is a clog in the drain line. If this is the issue, then it is a fairly easy fix – you may be able to use a standard plunger to clear the drain. Begin by filling up the other sink (not the one with the disposal) with water.

Why is my sink backing up when I run the garbage disposal? ›

If you notice water backing up in your kitchen sink, one of three things has probably happened: There is a blockage. You have been overusing your disposal. Your garbage disposal was not installed correctly.

Is the dishwasher drain connected to the garbage disposal? ›

A dishwasher does not have a separate drain as part of your home's plumbing system. Instead, it drains through the disposal. That includes any food debris washed off the plates and bowls during the cleaning cycle. When the disposal is draining slowly or is clogged, those problems can affect the dishwasher.

What's the difference between a garbage disposal and an InSinkErator? ›

On average, a Waste King garbage disposal reaches an RPM of 2,500 while an InSinkErator disposer only reaches a maximum of 1725 RPM, which is 30% less than the Waste King. Though InSinkErator offers some models with multiple grinding stages to make up for this disadvantage.

How much does Home Depot charge to install a garbage disposal? ›

Home Depot – The garbage disposal installation cost from Home Depot is approximately $119. However, this does not include the added cost of a garbage disposal unit, which costs an average of $161, bringing it to a total cost of $280.

Does drain need to be lower than garbage disposal? ›

The drain into the wall needs to be below that of the disposal and sink, there's no way to beat gravity with this. Your options are to: Raise the disposal output (with a different disposal) Raise the sink (with a different, shallower sink, or at least a shallow drain for the disposal)

How much space should there be on each side of the sink? ›

Regardless of where you place your kitchen sink, you will want to make sure to have at least 20 to 24 inches of countertop space on each side of the sink. This will give you enough room to leave drying dishes, or to prepare food for cooking.


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