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How to Install a Garbage Disposal

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Last updated February 13, 2025

A garbage disposal, sometimes called a food waste disposer, makes it easier to get rid of certain types of food waste and keep your kitchen clean. Many types of garbage disposals begin to wear out after more than a decade. This guide reviews how to install a garbage disposal, either for the first time or when you need to replace an old one.

Tip: Check with local codes before attempting to install a garbage disposal. Some communities have plumbing codes that don’t allow disposals because of limits on sewer capacity. They may also require an air gap if the disposal is used with a dishwasher.

Difficulty:

Intermediate

Duration:

Under 2 hours

Project Guide
Home Improvement Ideas
Appliance Guides
Garbage Disposals
Video

Table of Contents

  1. Gather Tools and Materials

  2. Considerations Before Changing Out a Garbage Disposal

  3. Prepare for Replacing a Food Waste Disposer

  4. How to Remove a Garbage Disposal

  5. Wire the Disposal

  6. Insert the Drain Flange