Turn off power and water before you touch anything

The first and most important step is to cut power to the disposal. Flip the breaker that controls the outlet under your sink, or unplug the unit if it has a plug. Do not rely on the wall switch alone — someone could turn it back on while you are working. Test the disposal by flipping the switch to confirm it does not run.

Next, turn off the water supply to your sink. Look under the sink for the shutoff valves on the hot and cold water lines. Turn both clockwise until they stop. If you cannot find shutoff valves under the sink, you may need to shut off water to the whole house at the main valve. Open the faucet to release any remaining pressure in the lines.

Key Takeaways

  • Cut power at the breaker and turn off water supply before starting any work on the disposal.
  • Disconnect the drain lines and mounting hardware by hand or with basic tools like a wrench and screwdriver.
  • The disposal unit itself unbolts from the sink drain opening and can be lifted out once all connections are free.
  • You can cap the drain opening with a knockout plug or install a new disposal in its place.
  • If you are not comfortable working under the sink, a plumber can remove the unit for $150 to $300 depending on your area.

Disconnect the drain lines from the disposal

Look at the pipes connected to the disposal. There is usually a drain line coming from the sink and a line going to the wall or floor drain. Use a bucket or towel to catch any water still in the pipes. Loosen the slip nuts (the large nuts holding the pipes on) by turning them counterclockwise with a pipe wrench or adjustable wrench. Hand-tighten them the rest of the way and pull the pipes free.

If the disposal is connected to a dishwasher, you will see a rubber or plastic hose clamped to the side of the unit. Loosen the hose clamp with a screwdriver and slide the hose off. Plug or cap the hose opening to prevent leaks when you turn the water back on later.

Remove the mounting ring and bolts

The disposal hangs from a mounting ring bolted to the sink drain opening. Look up inside the sink drain from below. You will see three bolts around the ring, usually spaced evenly. Use an adjustable wrench or socket wrench to turn each bolt counterclockwise. They do not need to come all the way out — just loosen them enough that the ring moves freely.

Once the bolts are loose, turn the mounting ring itself counterclockwise by hand. It will unscrew from the sink drain opening. Keep turning until the ring comes free. The disposal will now be resting only on your hands or a support you have placed under it.

Lift the disposal out and set it aside

The disposal is heavy — usually 8 to 15 pounds depending on the model. Support it with both hands or rest it on a bucket or stool before you remove the mounting ring completely. Once the ring is free, carefully lower the disposal and set it on the floor or a work surface. Do not drop it, as this can damage the unit or your sink.

If you plan to reinstall a disposal later, keep the mounting ring, bolts, and any rubber seals. If you are replacing it with a new unit, you may be able to reuse the ring and hardware, though some plumbers prefer to install a new mounting assembly for a tighter seal.

Cap or prepare the drain opening

With the disposal removed, you now have an open hole in your sink drain. If you are not installing a new disposal, you need to cap this opening. A knockout plug or drain cap screws into the opening and seals it. These cost $5 to $15 and are available at any hardware store. Screw the cap in clockwise until it is snug — do not over-tighten, as this can crack the plastic fitting.

If you are installing a new disposal, follow the manufacturer's instructions for the new unit. Most disposals come with a new mounting ring and hardware. Remove the old ring completely and install the new one according to the instructions that come with the new disposal.

Reconnect water and power

Once the drain is capped or the new disposal is in place, reconnect the drain lines. Hand-tighten the slip nuts first, then use a wrench to snug them an additional quarter turn. They should be tight enough not to leak but not so tight that you strip the threads. Turn the water supply back on at the shutoff valves under the sink. Check for leaks around all the connections you just made.

If you capped the drain, you are done. If you installed a new disposal, restore power at the breaker and test the unit according to its instructions. Run water through the sink for a few seconds to confirm everything works and there are no leaks.

When to call a plumber instead

Removing a disposal is straightforward if you are comfortable working under a sink and using basic hand tools. However, if the bolts are stuck or corroded, if you cannot locate the water shutoff valves, or if you are not confident working around plumbing, a plumber can do the job. Most charge $150 to $300 for removal and capping, depending on your location and how difficult the unit is to access.

If you are replacing the disposal, the plumber can also install the new unit, which typically adds $100 to $200 to the total cost. This route makes sense if you want the work done quickly or if you want someone to handle both removal and installation in one visit.

Frequently Asked Questions

Do I need to turn off water to the whole house?

No, if you can find the shutoff valves under the sink, turn those off instead. They control only the water to your sink. If there are no valves under the sink or they do not work, then you will need to shut off the main water supply to the house.

Can I remove the disposal myself if I have never done plumbing work before?

Yes. The job requires only a wrench, screwdriver, and basic hand strength. The most important step is turning off power and water first. Take your time, and do not force any bolts or connections. If something feels stuck, stop and consider calling a plumber rather than risking damage.

What do I do with the old disposal after I remove it?

Most garbage disposals contain metal and plastic that can be recycled. Check your local recycling program or waste management facility to see if they accept appliances. Some scrap metal dealers will also take old disposals. Do not throw it in the regular trash if recycling is an option.

Is it okay to leave the drain opening uncapped?

No. An open drain allows sewer gases to enter your home and creates a safety hazard. Always cap the opening with a knockout plug or install a new disposal. The cap is inexpensive and takes less than a minute to install.

How long does it take to remove a disposal?

Most removals take 30 minutes to an hour if all the bolts and connections come free easily. If bolts are corroded or stuck, it can take longer. Budget extra time if you are unfamiliar with the work.