How to Replace a Garbage Disposal

By | Last updated on |Appliances, Kitchen|4 Comments

This project explains how to replace a broken garbage disposer with a new Waste King® Legend L-8000 1 HP unit that features a Lifetime In-Home Service Warranty. I also changed the hardwired electrical hookup to a single wall outlet for use with a plug-in power cord.

Old Garbage Disposer Stopped Working

The 10+ year old 1/3 HP InSinkErator® garbage disposer stopped working. I could’ve picked up a replacement unit from my local home improvement store, but decided to broaden my horizons and do some research on what was available in terms of quality and price.

Broken Insinkerator 1/3 HP Garbage Disposer

Broken Insinkerator 1/3 HP Garbage Disposer

Waste King Legend 8000 Garbage Disposer

Consumer Reports rated the Waste King Legend 8000 as the best unit in the August 2009 issue. The Waste King L-8000 features a Lifetime In-Home Service Warranty. I bought mine from Amazon.com at a huge discount off the $339 normal retail price and it arrived in 2-days by UPS with free Super-Saver Shipping. What a deal!

Waste King Legend 8000 Garbage Disposer Model L-8000

Waste King Legend 8000 Garbage Disposer Model L-8000

The Waste King Legend 8000 comes with the power cord already attached, uses standard 120VAC power and draws 7 AMPs of power, which is well within the standard 15AMP household circuit. The Waste King features an FAQ: EZ Mount System which I found to be simpler than the traditional 3-bolt mount and needed no tools to install the EZ Mount.

Waste King Legend 8000 EZ Mount System

Waste King Legend 8000 EZ Mount System

Closeup view of the EZ Mount components:

Waste King Disposal - EZ Mount Components

Waste King Disposal – EZ Mount Components

Leaky Hot Water Dispenser

After I cleared out the cabinet in preparation for removing the old garbage disposal, I noticed my InSinkErator Instant Hot Water Dispenser (also 10 years old) was leaking. The surprising thing was the hot water dispenser was still working and hadn’t tripped the GFCI outlet. I removed the hot dispenser by:

  1. Unplugging the dispenser electrical cord.
  2. Shutting off the water valve.
  3. Unscrewed the nut on the 1/4″ copper tube compression fitting.
  4. Capped off the water valve with a 1/4″ brass compression cap.
  5. Removed the copper and plastic tubes from the top of the hot water dispenser unit.
  6. Turned the water supply valve on and checked for leaks.
Leaking InSinkErator Instant Hot Water Dispenser

Leaking InSinkErator Instant Hot Water Dispenser

A brief inspection found this unit was in really bad shape:

Leaking and Corroded Instant Hot Water Dispenser

Leaking and Corroded Instant Hot Water Dispenser

I later replaced the instant hot water dispenser.

This project is continued in How to Replace a Garbage Disposal – Part 2.

Take care,

Bob Jackson

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4 Comments

  1. bill meredith April 19, 2011 at 1:02 pm - Reply

    Thank you for this in depth step-by-step tutorial in replacing a garbage disposal. I replaced my old Insinkerator Badger 5 which was badly corroded and leaking water into the electrical compartment with a Waste King L3200 model. Due to these instructions, wiring in a new outlet receptacle and replacing the garbage disposal was a breeze! I will be back again for information on other DIY projects I have coming up!

  2. Patty January 8, 2012 at 10:17 pm - Reply

    Thanks for the instructions and the comments! Not only did you educate me in the ways of disposal installation, but you helped me decide which disposal to buy. Waste King “Legend” series it is! And I’ll shop for a hot water dispenser as well; didn’t really think of it until I saw yours.

  3. Marlene August 3, 2015 at 8:57 pm - Reply

    Thank you so much for this tutorial! How lucky I was to find this set of very detailed instructions for the exact disposal I was installing and the the one I was removing. I was even replacing a hard-wired version with a plug in model, so the instructions for wiring a new outlet were especially appreciated. The only difference between my situation and that shown in the photos was that I had a stainless steel sink. So I for that part, I followed the instructions that came with the disposal which said to install the sink flange with a gasket instead of plumber’s putty. Take my advice and use plumber’s putty if you’re in this situation. The gasket leaked and I had to take the whole thing apart and secure the sink flange with putty. Thanks again!

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