Shut off power and water before you start

Removing a garbage disposal means disconnecting it from three things: the electrical outlet, the sink drain, and the mounting ring that holds it under the sink. Before you touch anything, turn off power at the breaker box — flip the switch for the outlet where the disposal plugs in, or turn off the main breaker if you are not sure which one controls it. Then turn off the water supply to your sink by closing the shutoff valves under the sink, or by closing the main water valve if you cannot find the sink shutoffs.

Once power and water are off, run the disposal one more time to make sure it is truly dead. This clears any water still in the lines and confirms the power is gone. Wait a few seconds, then reach under the sink and feel the disposal — it should not move or hum.

Key Takeaways

  • Turn off power at the breaker box and water at the shutoff valves before disconnecting anything.
  • The disposal is held in place by a mounting ring that twists counterclockwise; you may need a wrench or the special wrench that came with the unit.
  • Disconnect the drain pipe and the electrical cord, then lower the disposal out from under the sink.
  • If you are replacing it, the mounting ring stays in place; if you are leaving the sink without a disposal, you will need a new drain assembly.
  • The whole job takes 30 to 60 minutes if you have basic tools and the space under your sink is not cramped.

Disconnect the drain pipe and electrical cord

Look under the sink at the disposal. You will see a large pipe coming out of the side or bottom — this is the drain line that carries waste water away. Loosen the slip nut (the large hexagonal nut) that holds this pipe to the disposal by turning it counterclockwise with an adjustable wrench or pliers. Once it is loose enough, unscrew it by hand and pull the pipe away. Water may drip out, so have a bucket or towel ready.

Next, find the electrical cord. It either plugs into an outlet under the sink or is hardwired into the wall. If it plugs in, straightforward unplug it. If it is hardwired, you will see a junction box where the cord enters the disposal. Open this box and you will find wire nuts holding three wires together — one black (hot), one white (neutral), and one bare copper (ground). Untwist each wire nut and separate the wires. If you are not comfortable working with electrical wires, stop here and call a plumber.

Remove the mounting ring and lift out the disposal

The disposal hangs from a mounting ring bolted to the sink drain opening. This ring has three or four bolts around its edge. Use an adjustable wrench or the special wrench that came with your disposal to loosen these bolts by turning them counterclockwise. Loosen all of them a little bit at a time, working around the ring, so the weight stays balanced. Once all bolts are loose, you can unscrew them by hand.

With the bolts removed, the disposal will drop slightly. Support it with one hand while you unscrew the bolts completely, then lower it carefully into the space below. The disposal is heavy — usually 8 to 15 pounds — so use both hands and do not let it fall. Once it is out, set it aside or take it to a recycling center that accepts metal appliances.

What to do with the mounting ring

The mounting ring stays attached to the sink drain opening. If you are installing a new disposal, you can leave it in place — the new unit will bolt to the same ring. If you are not replacing the disposal and want to use your sink without one, you will need to remove the old drain assembly and install a new one that does not have a disposal connection.

To remove the old ring, you will need to disconnect it from underneath the sink. This usually means unbolting it from the sink flange (the metal ring around the drain hole). If you are not replacing it, you can buy a standard drain assembly at any hardware store for $15 to $40. Installation takes about 20 minutes and involves bolting the new assembly to the sink and connecting the drain pipe.

Reconnect your drain if you are not replacing the disposal

If you removed the disposal but want to keep using your sink, you need a way for water to drain. If the old mounting ring is still there, you can buy a straightforward drain plug or strainer basket that fits into it. These cost $10 to $25 and screw into the ring in place of the disposal.

Connect your drain pipe to this new assembly the same way you disconnected it from the disposal — use the slip nut to tighten the pipe onto the drain outlet. Make sure the connection is snug so water does not leak. Turn the water back on and run water through the sink to check for drips. If water leaks from the slip nut, tighten it a quarter turn at a time until it stops.

Turn the water and power back on

Once everything is disconnected and the new drain is in place (if you installed one), turn the water back on by opening the shutoff valves under the sink. Let water run for a few seconds and watch for leaks around the drain connection. If you see drips, turn the water back off and tighten the slip nut a little more.

If you had a hardwired disposal, the electrical wires are already disconnected and capped with wire nuts, so there is nothing else to do on the electrical side. If the outlet under your sink is now empty, you can leave it as is or use it for something else. Do not plug anything into it unless you are sure it is on a different circuit from other high-draw appliances.

Tools and materials you will need

Most of this job requires only basic tools: an adjustable wrench or pliers, a bucket or towel for spills, and a flashlight to see under the sink. If your disposal came with a special wrench for the mounting bolts, use that instead of a regular wrench — it fits better and is less likely to slip.

If you are installing a new drain assembly, you will also need plumber's putty or silicone caulk to seal the connection between the drain flange and the sink, and possibly a new slip nut if the old one is damaged. These items cost $5 to $15 total and are sold at any hardware store.

Frequently Asked Questions

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

You can do it yourself if you are comfortable working under a sink and handling basic hand tools. The job is mostly about unbolting and unscrewing things. The only part that requires caution is the electrical disconnect — if your disposal is hardwired rather than plugged in, and you are not sure how to work with wires, call a plumber for that step.

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

Take it to a scrap metal recycler or an appliance recycling center. Many communities have free drop-off days for metal appliances. Do not put it in the trash — it is too heavy and contains metal that can be reclaimed. Some recyclers will even pay you a few dollars for the scrap metal.

Will my sink drain work without a garbage disposal?

Yes, as long as you install a standard drain assembly in place of the disposal. This is just a strainer basket and drain pipe — it works the same way a sink drained before disposals were common. You will need to be more careful about what goes down the drain, since there is nothing to grind up food scraps.

How long does it take to remove a disposal?

If you have clear access under the sink and the bolts are not stuck, 30 to 45 minutes is typical. If the space is cramped, bolts are rusted, or you need to install a new drain assembly, add another 30 minutes. Having a helper makes the job easier because someone can hold the disposal while you work on the bolts.

What if the mounting bolts are stuck and will not turn?

Spray them with penetrating oil (like WD-40) and wait 15 to 20 minutes, then try again. If they still will not budge, tap the wrench gently with a hammer to break the corrosion loose. Work slowly — forcing a stuck bolt can strip it or break the wrench. If nothing works, a plumber has better tools and experience getting stuck bolts out without damage.