Removing and Replacing a Garbage Disposal: A Step-by-Step Guide

If your garbage disposal has seen better days and it's time for a replacement, don't let the task intimidate you. With a bit of know-how and the right tools, you can tackle this project like a pro. Here's a comprehensive guide on how to take out your old garbage disposal and install a new one.

Safety First: Preparation and Tools
Before you start, ensure you're working safely. Unplug the disposal from the electrical outlet and turn off the power at your home's main electrical panel. Gather your tools: adjustable wrench, screwdriver, pliers, channel-type pliers, and a new garbage disposal.

- New garbage disposal
- Adjustable wrench
- Screwdriver
- Pliers
- Channel-type pliers
Disconnecting the Drain Lines and Electrical Wiring

Start by disconnecting the drain lines. Using your adjustable wrench, loosen and remove the large slip nut that connects the drain line to the disposal. Repeat this process for the dishwasher drain line, if applicable. Next, disconnect the electrical wiring by removing the wire connectors and loosening the mounting screws that secure the disposal to the mounting ring.
Disconnecting the Dishwasher Drain Line (if applicable)
If your dishwasher is connected to the disposal, you'll need to disconnect it as well. Use your pliers to loosen and remove the clamp that secures the dishwasher drain line to the disposal. Pull the line off and set it aside.

Removing the Old Garbage Disposal
Now that everything is disconnected, it's time to remove the old disposal. First, unscrew the three mounting screws that secure the disposal to the mounting ring. Once the screws are loose, you should be able to lift the disposal out of the cabinet. If it's stuck, try rocking it back and forth to break the seal.
Cleaning the Mounting Area

Before installing the new disposal, take a moment to clean the mounting area. Wipe away any debris or old plumber's putty, ensuring the new disposal has a clean surface to seal against.
Installing the New Garbage Disposal




















Begin by applying a generous amount of plumber's putty around the bottom flange of the new disposal. This will create a watertight seal. Carefully lower the disposal into the mounting ring, ensuring the putty is evenly distributed. Secure the disposal with the three mounting screws, but don't tighten them all the way yet.
Connecting the Drain Lines and Electrical Wiring
Reconnect the drain lines by sliding the rubber gasket over the disposal's discharge outlet and securing it with the large slip nut. Repeat this process for the dishwasher drain line, if applicable. Reconnect the electrical wiring by securing the disposal's electrical wires to the corresponding wires from your home's electrical system using wire connectors. Ensure the wires are properly connected and the connectors are tight.
Tightening the Mounting Screws
Once everything is connected, tighten the mounting screws securely. Be careful not to overtighten, as this can damage the disposal. Turn the disposal's impellers by hand to ensure they're free and spinning smoothly.
Testing the New Garbage Disposal
Before you celebrate a job well done, test your new disposal to ensure it's working properly. Fill the sink with a few inches of water, then turn on the disposal and let it run for a few seconds. The water should drain quickly and without any leaks. If everything checks out, you're all set!
| Old Garbage Disposal | New Garbage Disposal |
|---|---|
| Disconnect drain lines and electrical wiring | Connect drain lines and electrical wiring |
| Remove old disposal | Apply plumber's putty and install new disposal |
| Clean mounting area | Tighten mounting screws and test new disposal |
And there you have it! With a little elbow grease and these simple steps, you've successfully removed your old garbage disposal and installed a new one. Enjoy your updated kitchen and the peace of mind that comes with a well-functioning garbage disposal.