Do you want to change a garbage disposal yourself? Do you want to know what tools you need to replace it? Garbage disposal installation costs can be relatively high, but following our guide in this post makes it easy to get the job done. You only need a few hours and the right disposal to install, and the rest is very simple. Just follow our guide, save money, and change a garbage disposal at minimal cost.

What a garbage disposal does

A garbage disposal grinds food scraps so they go down the sink instead of the trash. You can change a garbage disposal yourself with basic tools in about 1–2 hours.

What you’ll need to change a garbage disposal

• Garbage disposal unit (0.5–1 HP common)
• Plumber’s putty
• Screwdriver, pliers, wrench, putty knife
• Power cord kit (if unit needs one)
• Bucket and rag
• Optional: PVC tailpiece if replacing drain piping
• A 3-1/2″ sink drain hole and a dedicated outlet under the sink

Step-by-step installation (easy version)

1. Turn off power and water
   • Switch off the breaker for the sink area.
   • Turn off the water supply if needed.
2. Remove the old unit (if you have one)
   • Put a bucket under the pipes.
   • Loosen the drainpipe and remove it.
   • Unscrew or twist off the mounting ring and drop the old unit.
3. Prepare the sink flange
   • Scrape old putty off the sink with a putty knife.
   • Roll plumber’s putty into a rope and press it around the new flange.
   • Drop the flange into the sink drain and press down.
4. Secure the mounting ring
   • From under the sink, fit and tighten the mounting ring to hold the flange in place.
5. Attach the disposal
   • Lift the disposal and twist it onto the mounting ring until it locks.
6. Hook up the drain pipe
   • Connect the disposal’s discharge to the sink drain or PVC tailpiece.
   • Tighten the slip nuts by hand, then a quarter turn with a wrench.
7. Wire the unit (only if needed)
   • Make sure the breaker is off.
   • Connect the power cord: black to black, white to white, green to ground.
   • If you’re not comfortable with wiring, hire an electrician.
8. Connect the dishwasher (if applicable)
   • Remove the knockout plug inside the disposal inlet before attaching the dishwasher hose.
   • Tighten the hose clamp.
9. Test for leaks and operation
   • Turn the water on.
   • Restore power at the breaker.
   • Run cold water and turn on the disposal.
   • Check for leaks and listen for smooth operation.

Common mistakes to avoid when you change a garbage disposal

• Don’t skip plumber’s putty — it prevents leaks.
• Don’t overtighten plastic fittings — they can crack.
• Make sure the disposal is straight when locking on the mounting ring.
• Always turn off power before wiring.

Disposal Care and maintenance

• Run cold water while grinding.
• Don’t put grease, large bones, or fibrous foods (celery, corn husks) in it.
• Clean monthly: grind ice cubes and a cup of vinegar.
• If it jams, press the red reset button on the bottom after power is off.
• Call a pro if it leaks, hums without turning, or you’re unsure about wiring.

Garbage Disposal Installation Cost in Austin and Lakeway

The garbage disposal installation cost in Austin and Lakeway depends on the unit type and your sink setup. Expect to pay $300-$500 for the disposal installation cost. For a basic 1/2 horsepower model, expect to pay for the unit and labor to fit it under your sink in Austin homes. More powerful 1-horsepower units raise the garbage disposal installation cost but handle bigger scraps better for Lakeway kitchens. Our team at All Austin Repairs offers clear pricing for garbage disposal installation costs, checking your plumbing in areas like downtown Austin or Bee Cave to avoid surprises. Call us for a free quote to keep your kitchen clean and working well.

FAQ on How To Change a Garbage Disposal

1. What tools do I need to Change a Garbage Disposal?

You need a screwdriver, pliers, and a wrench for garbage disposal installation. Plumber’s putty and a putty knife help seal the sink flange.

2. How long does garbage disposal installation take?

Garbage disposal installation usually takes 1-2 hours for a pro. It depends on your sink setup and if pipes need adjusting.

3. Can I Change a garbage disposal myself?

Yes, you can change a garbage disposal with basic tools and a manual. Watch a video guide to follow steps safely.

4. Do I need a plumber for garbage disposal installation?

A plumber isn’t always needed for garbage disposal installation. If wiring or pipes are tricky, a pro makes it faster.

5. What size unit is best for garbage disposal installation?

For most homes, a 1/2 to 3/4 horsepower unit works for garbage disposal installation. Bigger families might need a 1 horsepower model.

6. How do I prepare my sink for garbage disposal installation?

Remove the old unit and clean the sink drain before garbage disposal installation. Make sure the power and water are turned off.

7. Does garbage disposal installation need special wiring?

Garbage disposal installation needs a dedicated outlet under the sink. A pro can add one if your kitchen doesn’t have it.

8. Can garbage disposal installation work with a double sink?

Yes, garbage disposal installation fits double sinks with the right drain kit. Connect the second sink to the disposal’s tailpipe.

9. How do I avoid leaks after garbage disposal installation?

Tighten all connections and use plumber’s putty during garbage disposal installation. Run water to test for drips after setup.

10. Is a dishwasher needed for garbage disposal installation?

No, garbage disposal installation works without a dishwasher. If you have one, connect its drain hose to the disposal’s port.