Turn off power and water before you start

Removing a garbage disposal is a straightforward job that takes about an hour if you have basic tools. 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 — someone could turn it on while you are working.

Next, turn off the water supply to the sink. Look under the sink for the shut-off valve on the hot water line and turn it clockwise until it stops. If you cannot find a valve or it will not turn, you can proceed but work carefully to avoid a flood when you disconnect the drain lines.

Key Takeaways

  • Kill power at the breaker and shut off water before you touch anything under the sink.
  • The disposal is held to the sink by a mounting ring that twists counterclockwise by hand or with a wrench.
  • You will need to disconnect the drain pipe and the electrical connection, both of which take less than five minutes.
  • The whole job requires only a bucket, a wrench, and a screwdriver — no special tools.
  • If you are not replacing the disposal, you will need a sink strainer and a P-trap to reconnect the drain.

Disconnect the drain lines and electrical cord

Place a bucket under the P-trap (the curved pipe below the drain) to catch any water still in the line. Loosen the slip nuts — the large hand-tight fittings on either end of the P-trap — by turning them counterclockwise with a wrench. Once loose, unscrew them by hand and pull the P-trap away from the wall and the disposal.

If the disposal is hardwired to an electrical outlet (not plugged in), you will need to access the junction box. This is usually a small metal or plastic box mounted on the wall or inside the cabinet. Loosen the cover and disconnect the wires inside — typically black to black, white to white, and bare copper to bare copper. If you are unsure about electrical work, stop here and call a plumber.

If the disposal has a plug, straightforward unplug it from the outlet under the sink. This is the easiest setup and the safest for a first-time removal.

Remove the mounting ring and lift out the disposal

The disposal hangs from a mounting ring bolted to the sink's drain opening. Look up from underneath the sink and you will see a ring with three or four bolts around its edge. Use a wrench to turn each bolt counterclockwise until they are loose enough to remove by hand. Some disposals have a snap ring instead — this twists counterclockwise by hand until it releases.

Once the bolts or ring are free, the disposal will drop into your hands. It is heavy — usually 8 to 12 pounds — so support it as you work it free from the sink opening. Set it aside on a towel or newspaper to catch any remaining water or food debris.

Clean the sink opening and remove the old flange

With the disposal out, you can now see the sink flange — the metal ring that sits in the drain hole. If you are installing a new disposal, you can leave this in place. If you are not replacing the disposal and want to use a standard sink strainer instead, you will need to remove the flange.

The flange is usually held in place by plumber's putty or caulk around its underside. Use a putty knife or old butter knife to scrape away the old putty from both the top and bottom of the sink. Once the putty is gone, the flange should lift out. Clean away any remaining putty with a rag and mineral spirits or rubbing alcohol.

What to do if you are not installing a new disposal

If you are removing the disposal but not replacing it, you will need a standard sink strainer and a new P-trap to reconnect the drain. A sink strainer costs $5 to $15 and comes with a rubber gasket and metal washer. Install it by placing the rubber gasket on the underside of the sink, inserting the strainer from above, and tightening the nut underneath by hand.

Reconnect the P-trap to the strainer using the slip nuts you removed earlier. If the old P-trap is damaged or corroded, replace it with a new one — they cost $10 to $20 and come in standard sizes. Hand-tighten the slip nuts first, then use a wrench to snug them another quarter turn. Do not over-tighten, or you will crack the plastic fittings.

Turn the water back on and run the sink for 30 seconds to check for leaks. If water drips from the slip nuts, tighten them slightly more with a wrench.

Disposal removal tools you will need

You do not need specialty tools for this job. A standard adjustable wrench handles all the nuts and bolts. A bucket catches water from the P-trap. A screwdriver helps if you need to open an electrical junction box. A putty knife scrapes old caulk and plumber's putty from the sink flange. A flashlight or headlamp makes it easier to see under the sink.

If the bolts on the mounting ring are stuck, a penetrating oil like WD-40 sprayed on them 15 minutes before you start can help. Let it soak while you disconnect the drain and electrical lines, then try the wrench again.

Common problems and how to fix them

The most common issue is a stuck mounting ring. If the bolts will not turn, do not force them — you can strip the bolt head or crack the plastic ring. Spray penetrating oil around the bolts and wait 20 minutes. If they still will not budge, you can carefully use a hacksaw to cut a slot in the bolt head and use a flat-head screwdriver to turn it. This takes longer but avoids damage.

Water may still be in the P-trap even after you place a bucket underneath. Loosen the slip nuts slowly and let the water drain into the bucket before you pull the trap away. If you pull too fast, water will spill onto the cabinet floor.

If the disposal is hardwired and you are not comfortable with the electrical connection, leave the wires alone and call a licensed electrician. The cost is usually $75 to $150 and is worth the safety.

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 with basic hand tools and turning off water and power. The job takes about an hour. If the disposal is hardwired to the electrical system rather than plugged in, or if you are unsure about any step, hiring a plumber is safer and costs $150 to $300.

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 center or waste management facility to see if they accept appliances. Some scrap metal dealers will also take them. Do not put it in the trash if recycling is an option.

Do I need to replace the sink flange when I remove the disposal?

No. The flange can stay in place if you are installing a new disposal. If you are not replacing the disposal and want to use a standard sink strainer instead, you will need to remove the old flange and install a new strainer, which costs $5 to $15.

What if water leaks from under the sink after I reconnect the drain?

Check the slip nuts on the P-trap. Hand-tighten them first, then use a wrench to snug them another quarter turn. If the leak continues, the P-trap may be cracked or the rubber gasket may be damaged. Replace the P-trap with a new one, which costs $10 to $20.

How long does it take to remove a garbage disposal?

About 45 minutes to an hour for someone doing it for the first time. The actual disconnection takes 15 to 20 minutes. The rest is time spent locating bolts, letting penetrating oil soak if bolts are stuck, and cleaning up water and debris.