Replacing a garbage disposal might seem intimidating, but with the right approach, it’s a straightforward project most homeowners can handle. In this detailed how-to video, Andrew walks you through exactly how to remove an old garbage disposal and install a new one safely and correctly — using common household tools.

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Table of Contents

Tools You’ll Need

• Flathead screwdriver
• Phillips screwdriver
• Wire snips (optional)
• Small hammer
• Towel (to catch water and debris)

Removal Process

Before installing a new garbage disposal, you’ll need to safely remove the existing unit. Here are the key steps covered in the video:

• Disconnect power by unplugging the unit under the sink
• Remove the dishwasher drain hose
• Disconnect the drain pipe from the P-trap connection
• Loosen the mounting ring and carefully lower the disposal
• Set the unit aside and prepare for electrical disconnection

Installation Steps

Once the old disposal is removed, Andrew walks through how to properly install the new unit:

• Transfer the electrical wiring from the old unit to the new one
• Knock out the dishwasher plug if your system requires it
• Install the drain connection and gasket
• Mount the new disposal to the existing sink flange
• Reconnect the drain pipe and dishwasher line
• Tighten all fittings evenly to prevent leaks
• Restore power and test the system

Frequently Asked Questions

How long does it take to replace a garbage disposal?

Most replacements can be completed in about 30–60 minutes, depending on your setup and experience level.

Do I need a plumber to replace a garbage disposal?

Not necessarily. With basic tools and careful attention to the steps, most homeowners can handle this as a DIY project.

Do I need to replace the sink flange?

In many cases, no. If your new disposal is compatible with the existing mount, you can reuse it and save time.

What is the dishwasher knockout plug?

It’s a small plastic insert inside the disposal that must be removed if you have a dishwasher connected — otherwise, water won’t drain properly.

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