Tools and Materials
Product costs, availability and item numbers may vary online or by market.
Key Takeaways
From removing the old unit to securing and testing the new one, we'll show you how to install or replace a garbage disposal.
- Step 1: Remove the old disposal.
- Step 2: Attach the mounting assembly.
- Step 3: Connect the drain lines and electrical wiring securely.
- Step 4: Seal the connections with plumber’s putty or tape.
- Step 5: Check for leaks and test the unit to ensure proper operation.
Before You Get Started
Whether you're doing a garbage disposal replacement or installing one for the first time, it'll attach to the sink and have a discharge that attaches to the drainpipe. Your dishwasher outlet hose attaches to the disposal.
Garbage disposals are typically available in 1/3 horsepower up to 1 horsepower. If you have a septic system, you'll need to purchase a septic-safe disposal. Check the manufacturer’s recommendations for your needs.
What Type of Garbage Disposal Should I Get?
Before you install or replace your new garbage disposal, it is important to think about what type of disposal you need. There are two primary types of disposal feed types, batch feed and continuous feed.
Batch Feed Disposals
Batch feed disposals can operate only when the magnetic stopper is in place, preventing accidental items from being dropped into the disposal. You can insert food in larger batches for running all at one time. This type is also good for homes where an electrical switch isn’t readily available.
Continuous Feed Disposals
Continuous feed disposals operate when the switch is turned on and the water is running. A power outlet is necessary to turn the unit on and off. This type is the most commonly installed model in homes.
Garbage disposals also are available in a range of horsepower (HP) ratings. 1/3 to 1/2 horsepower is the basic model, able to manage everyday food waste. For larger households or upgraded features, a 1 HP unit is the choice.
How to Remove the Garbage Disposal
Follow these instructions to remove the garbage disposal.
Instructions
How to Change a Garbage Disposal
If you don’t already have a disposal, you’ll need a nearby outlet and switch. Call a licensed electrician for installation, and find out if a permit is required.
Instructions
Test the Disposal
Test your connections by placing the stopper into the sink drain and filling the sink with water. Check for leaks. Finally, plug in the disposal and turn on the power.
Let's Get Started
If you're ready to tackle this project, purchase the disposal and tools needed to do the job. Shop online or visit your local Lowe's store.
Don't have time to do this project yourself? Check out our professional garbage disposal installation service.