Turn off power and water before you touch anything

Removing a garbage disposal means disconnecting it from both electricity and water, then unbolting it from the sink. The first step is safety: flip the breaker that controls the disposal to the off position, or unplug it if it has a plug under the sink. Do not rely on the wall switch alone — someone could turn it on while you work.

Next, turn off the water supply to the hot water line under the sink. Look for a shut-off valve on the hot water pipe coming from the wall. Turn it clockwise until it stops. If there is no valve, you may need to shut off water to the whole house. Run the hot water at the sink for a few seconds to release pressure in the line.

Key Takeaways

  • Always kill power at the breaker and shut off hot water before you start, because a disposal can injure you even when the switch is off.
  • The disposal is held to the sink by a mounting ring that twists counterclockwise — you may need a wrench or screwdriver to break it loose.
  • Disconnect the drain pipe and electrical cord last, after the disposal is free from the sink.
  • If you are replacing it, the new unit goes in the same mounting ring; if you are removing it permanently, you will need a standard drain basket to cap the hole.

Disconnect the drain pipes under the sink

Look under the sink at the pipes connected to the disposal. You will see a large pipe coming from the disposal (the discharge pipe) and possibly a smaller pipe from the dishwasher. Place a bucket underneath to catch water that remains in the pipes.

Loosen the large nut where the discharge pipe meets the disposal by turning it counterclockwise with a wrench or adjustable pliers. Once it is loose enough, unscrew it by hand and slide the pipe away. If there is a dishwasher hose, loosen the hose clamp with a screwdriver and pull the hose free. Do not force anything — if a connection is stuck, spray it with penetrating oil and wait 10 minutes.

Remove the mounting ring that holds the disposal to the sink

The disposal hangs from a metal ring bolted to the underside of the sink. This ring has three or four bolts around its edge. Use a wrench or socket set to loosen each bolt by turning counterclockwise. You do not need to remove them completely — loosen them until the ring is no longer tight against the sink.

Once the bolts are loose, twist the entire disposal counterclockwise. It will drop down as you turn. Keep turning until the disposal comes free from the mounting ring. The ring itself stays attached to the sink — you will not remove it unless you are replacing the disposal with a new one.

Disconnect the electrical cord

Once the disposal is free and resting on the floor or in a bucket, locate the electrical cord. If the disposal is hardwired (connected directly to the house wiring), you will see a wire connector inside a junction box. If it is plugged in, straightforward unplug it from the outlet under the sink.

For hardwired units, turn the wire connector counterclockwise to separate the wires. You may see a black wire, a white wire, and a bare copper or green wire. Do not touch the wires themselves — only the connector. Once the connector is loose, gently pull the wires apart and tuck them back into the junction box. If you are unsure about the wiring, take a photo before you disconnect anything.

Lift the disposal out and dispose of it properly

The disposal is now completely free. Lift it straight down and out of the cabinet. It is heavy — usually 8 to 15 pounds — so use both hands or ask someone to help. Place it on a towel or in a box to avoid scratching the cabinet floor.

Take the old disposal to a scrap metal recycler or an appliance recycling center. Many municipalities have hazardous waste collection days where you can drop it off for free. Do not put it in the trash — it contains metal and electrical components that should not go to a landfill.

Cap the drain hole if you are not replacing the disposal

If you are removing the disposal permanently and not installing a new one, the sink drain hole is now open. You need to cap it with a standard drain basket. These are inexpensive and come in different sizes to fit your sink opening.

Insert the drain basket into the hole from above the sink. It will rest on the mounting ring. The basket has a strainer that keeps food and debris out of the drain. You can buy a replacement basket at any hardware store for under $20 if the original one is damaged or missing.

What to do if the mounting ring is stuck

Sometimes the mounting ring bolts are corroded or over-tightened and will not budge. Spray penetrating oil around each bolt and wait 15 to 20 minutes. Try again with a wrench that fits snugly — a wrench that is too loose will strip the bolt head.

If a bolt still will not turn, do not force it. You risk breaking the bolt or cracking the sink. Instead, use a bolt extractor socket or call a plumber. A stuck bolt is not a sign you are doing something wrong — it is a sign the disposal has been in place for years and corrosion has set in.

Frequently Asked Questions

Can I remove a garbage disposal myself or do I need a plumber?

You can remove it yourself if you are comfortable working under a sink and using basic tools like a wrench and screwdriver. The job takes 30 to 60 minutes. Call a plumber if the mounting bolts are stuck, the wiring is hardwired and you are unsure about it, or you do not have the tools.

What do I do with the old disposal?

Take it to a scrap metal recycler or an appliance recycling center. Many areas have hazardous waste collection events where you can drop it off for free. Check your city or county website for locations and dates.

Do I have to replace the disposal or can I just leave the hole open?

You must cap the hole with a drain basket. An open hole will allow water to back up into the cabinet and can let pests enter the drain line. A standard drain basket costs under $20 and takes two minutes to install.

What if water leaks from under the sink after I remove the disposal?

Water in the pipes will drip when you disconnect them. Place a bucket under the connection before you loosen it. If water continues to leak after you have reconnected the drain pipe, the connection may not be tight enough — tighten the nut another quarter turn with a wrench.

Can I turn the water back on before I finish?

No. Keep the water shut off until the drain pipes are reconnected and tight. Turning water on with an open drain connection will flood the cabinet and make a mess.