What You're Replacing and Why It Matters

The Badger 5 is a 1/2-horsepower continuous-feed garbage disposal made by InSinkErator. It's one of the most common models in homes because it's affordable and reliable, but when it stops working—whether from a jam that won't clear, a motor that won't turn, or a leak—replacement is usually simpler and cheaper than repair. A new Badger 5 costs between $100 and $150, and the job takes two to four hours if you're comfortable working under a sink.

Before you start, confirm your disposal is actually dead. Turn off the breaker that powers it, wait 30 seconds, turn it back on, and try again. If it still won't run and you've cleared any visible jams with tongs (never your hands), replacement is the right move. If water is leaking from the unit itself rather than from a loose connection, the disposal cannot be repaired.

Key Takeaways

  • Turn off power at the breaker before you touch anything under the sink, and do not restore power until the new disposal is fully installed and connected.
  • You will need a bucket, adjustable wrench, screwdriver, plumber's putty, and a new Badger 5 unit; the mounting ring and splash guard usually come with the new disposal.
  • The hardest step is breaking the old unit free from the mounting ring—use a flat screwdriver and tap gently around the ring until it turns, or ask a helper to hold the sink flange steady while you work.
  • The new unit connects the same way the old one did: mounting ring underneath, discharge tube to the drain line, and power cord to the outlet or hardwired connection.
  • Test for leaks by running water for 30 seconds before you consider the job complete, and check again after 24 hours.

Gather Your Tools and Materials Before You Start

You will need an adjustable wrench (or two, if you have them), a flat-head screwdriver, a Phillips screwdriver, a bucket or large bowl, plumber's putty, and a flashlight or headlamp. Have towels nearby. If your old disposal is hardwired (connected directly to the electrical box rather than plugged into an outlet), you will also need a wire stripper and wire nuts, or you should call a licensed electrician to handle the electrical disconnect and reconnect.

Buy your replacement Badger 5 before you start. The new unit comes with a mounting ring, rubber gasket, and splash guard. You do not need to buy these separately. If your sink has a garbage disposal opening but no drain line connected yet, you will also need a discharge tube (the curved pipe that carries waste water from the disposal to the drain). These are inexpensive and come in standard sizes.

Turn Off Power and Remove the Old Disposal

Go to your electrical panel and switch off the breaker for the garbage disposal. If you are not certain which breaker it is, turn off the main breaker instead—you can turn it back on once you have confirmed the disposal is dead. Place a bucket under the disposal to catch water that will spill when you disconnect the drain line.

Reach under the sink and locate the mounting ring—the metal collar that holds the disposal to the sink flange above. You will see three bolts around the ring. Using an adjustable wrench, loosen these bolts by turning them counterclockwise. Do not remove them completely yet; just loosen them enough that the disposal can twist. Have a helper hold the sink flange steady from above, or brace yourself and use your other hand to grip the sink rim. Twist the disposal counterclockwise (when viewed from below) until it breaks free from the mounting ring. This is the hardest part of the job—the ring may be stuck from years of mineral buildup. If it will not budge, tap gently around the ring with a flat screwdriver and a hammer, then try twisting again.

Once the disposal is loose, lower it carefully and set it on the floor. Disconnect the discharge tube (the pipe running from the disposal to the drain) by loosening the hose clamp with a screwdriver. Disconnect the power cord by unplugging it, or if it is hardwired, call an electrician.

Prepare the Sink Flange for the New Unit

Look up into the sink opening. You will see the sink flange—the metal ring that sits in the drain hole. Remove the old plumber's putty from around the flange by scraping it away with a flat screwdriver. Wipe the area clean with a damp cloth and let it dry. This step matters because old putty can trap water and cause leaks.

Roll a new rope of plumber's putty between your hands until it is about the thickness of a pencil and long enough to go around the flange. Press it into the gap between the flange and the sink, all the way around. This creates a watertight seal. Do not use caulk or silicone—plumber's putty is removable and is the standard for this job.

Install the New Badger 5 Disposal

From below the sink, position the new disposal so the discharge outlet points toward the drain line. Align the mounting ring bolts with the holes in the sink flange. Insert the three bolts and hand-tighten them. Then, using an adjustable wrench, tighten each bolt in a rotating pattern (like tightening a car wheel)—tighten one bolt a quarter turn, then the next, then the third, then back to the first. This keeps the flange level and prevents leaks. Tighten until the disposal is snug but do not over-tighten, which can crack the flange.

Twist the disposal clockwise (when viewed from below) until it locks into the mounting ring. You will feel it catch. The disposal should now hang securely from the sink and not move when you push it.

Connect the Drain Line and Restore Power

Slide the discharge tube onto the outlet of the new disposal and tighten the hose clamp with a screwdriver. Make sure the other end of the tube connects to the drain line that runs to your main drain or septic system. If there is no drain line yet, you will need to install one—this is a straightforward job, but if you are not comfortable doing it, a plumber can do it in under an hour.

If the disposal is plugged into an outlet, straightforward plug in the power cord. If it is hardwired, turn off the main breaker and have a licensed electrician reconnect the wires. Do not attempt this yourself unless you are trained in electrical work.

Test for Leaks and Confirm Everything Works

Turn the breaker back on. Fill the sink with water and let it drain while the disposal is running. Watch underneath for leaks at the mounting ring, the discharge tube connection, and the drain line. If you see water dripping, turn off the disposal and tighten the connection where the leak is coming from. If the leak is at the mounting ring, you may need to tighten the bolts a bit more, or the putty may not have sealed properly—in that case, you will need to remove the disposal, scrape out the old putty, and start over with a fresh rope.

Run water for 30 seconds with the disposal on, then turn it off and check again. Leave the cabinet door open for an hour and check one more time. If everything is dry, you are done. Check again the next day to make sure no slow leaks have developed.

Frequently Asked Questions

Do I need a plumber to replace a garbage disposal?

No, if your old disposal is plugged into an outlet and you are comfortable working with basic tools. If it is hardwired to your electrical panel, you will need a licensed electrician to disconnect and reconnect the wires. A plumber can do the entire job in one to two hours if you prefer not to do it yourself.

What if the mounting ring won't turn?

Mineral buildup or corrosion can lock the ring in place. Try tapping gently around the ring with a flat screwdriver and hammer to break the seal, then attempt to twist again. If it still will not budge after several attempts, stop and call a plumber—forcing it can crack the sink flange.

Can I use my sink while I'm waiting for a new disposal?

Yes, but avoid putting food waste down the drain. Water and liquids are fine. If you have a double sink, you can use the other side normally as long as it does not share a drain with the disposal opening.

How long does a Badger 5 usually last?

Most Badger 5 disposals last 8 to 15 years with normal use. Lifespan depends on how often you use it and what you put down it—grinding bones, fibrous vegetables, and grease shortens the life of any disposal.

What should I do with the old disposal?

Take it to a scrap metal recycler or an electronics recycling center. Many accept small appliances. Do not put it in the trash. Some retailers that sell disposals also take old units for recycling.