Costco Garbage Disposal Review

If you mention Costco garbage disposal, I immediately think of Costco and all the great things you can buy there. I kind of ignore the words, “garbage disposal.”

I’m not someone who is delighted to fix things around the house. When my wife makes a “honey-do” list, she knows not to put anything on there too mechanical because I’ll probably ignore them.


Unfortunately, our garbage disposal went kaput, and I either need to fix it myself or find someone to do it for me. Either way, I want to find the best deal on a garbage disposal, and that brings me to Costco.

My loss (the cost to buy a new garbage disposal) is your gain – I spent time researching all the Costco garbage disposals and can help you out if your disposal craps out in the near future.

5 Top Costco Garbage Disposal Selections

InSinkErator Evolution Excel Garbage Disposer 1.0 HP

If you’re replacing an old, noisy disposal, then you’ll be amazed at how quiet this one is.

It gobbles on your discards without much hassle or noise. With the water running, you can barely hear it do its job!

This beast of a machine may possibly be larger than the one you are replacing, so there may be less room under the sink, but it will do the job efficiently and effortlessly.

With a full one horsepower, it is a match for almost any discarded item of food.

At 25 pounds, it may be difficult for one person to install – at least that’s what I told my wife!

KitchenAid KCDS100T 1 HP

KitchenAid KCDS100T 1 hp

Another powerful one-horsepower machine, it seems like you can almost power a small car with this monster. The continuous-feed system allows you to keep tossing food in even as it’s running.

The Jam-Sensor circuit automatically senses difficult jams, then powers up the disposal to grind its way through.

Replacing your old garbage disposal with this one is like replacing a Yugo with a BMW.

Quality and power meet in this machine to create one formidable garbage-munching beast!

InSinkErator Evolution Garbage Disposal, 3/4 HP

A smaller version of the InSinkErator listed above, this one is perfect for smaller households and those with limited cabinet space.

Equipped with sound sealing technology and a patented multi-grind system, it has enough power to grind up carrot peels, potato skins, and other difficult food waste, and it probably runs quieter than the one you have now!

InSinkErator Evolution Compact Garbage Disposal 3/4 HP

InSinkErator Evolution Compact Garbage Disposal 3-4 HP

Quiet, compact, and efficient – if those words matter to you, this Costco garbage disposal should be at the top of your list.

Don’t let its compact size fool you – it can grind up difficult food with the best of them.

It has stainless steel components for durability and is the perfect solution if space is at a premium.

Waste King Legend Series L-8000 1 HP

Waste King Legend Series L 8000 1 HP

The Waste King is a continuous-feed disposal that is durable, quiet, and comes with a limited lifetime warranty.

It’s grinding chamber is made with glass-filled nylon, which means it will never corrode.

Because of the 1 HP motor, the grinding and pulverizing will be completed quicker than models with smaller motors.

This one is not made for homes with limited space as it’s on the larger side. If you cook frequently, this is the one for you!


Tossing food in the sink is a true modern convenience. Our grandparents survived without a kitchen garbage disposal, but these grinding, munching machines have become ubiquitous in modern times.

However, that convenience comes with a certain amount of cost and hassle. Garbage disposals will eventually break, and either need repair or replacement. When repair isn’t an option, a new one needs to be purchased and installed. Even if you’re handy with a screwdriver and don’t need to hire someone for installation, a garbage disposal replacement costs much more than pocket change.

Here are a few facts to know before you set out to look for a Costco garbage disposal:

How Many Types of Garbage Disposals are There?

There are two basic types of disposals: Continuous-feed and batch-eed types. Batch feed require the user to place the waste into a chamber, and then close a stopper lid to activate the machine. It then grinds the food to a pulp. These are best for families with small children who might stick their hands in the drain or for those of us who always seem to forget that a fork fell into the drain. The continuous-feed models have an open mouth and can be activated by a simple wall switch – don’t forget to check for stray silverware! Continuous-feed are the ones most commonly purchased.

What Motor Size Should I Buy?

Costco garbage disposals often come in a range of motor sizes, just like cars. You’ll often find 1/3 HP, ½ HP, ¾ HP, and 1 HP. If you eat Vegan and mostly plan on only grinding up soft vegetables, then a 1/3 to ½ HP will do the trick. However, if you eat more than vegetables, and want to ensure less jams and greater pulverization of your food (better for the waste water system and pipes), then paying the extra money for a more powerful disposal (3/4 or 1 HP) is best.

  • 1/3 HP – soft foods and a one or two-person household.
  • ½ HP – general food items and a small household.
  • ¾ HP – common size for most households, quieter, and able to grind most foods.
  • 1 HP – heavy usage, larger households, and great for people who cook often.

What are the Top Garbage Disposal Brands?

When shopping for a Costco garbage disposal, three of the top brands are InSinkErator, KitchenAid, and Waste King/\. These all have excellent reputations.

Why are Grind Stages Important?

The more grind stages a garbage disposal has, the finer the final waste product will be. It’s better for your septic tank or waste disposal system when the waste is finer. Less jams, less clogs, and less repairs.

What Questions Should I Consider Before Buying a Costco Garbage Disposal?

Here are the most important questions to ask yourself before buying:

  • How large is your household?
  • How large in the cabinet space for the disposal?
  • How important is quiet operation (compared with the cost)?
  • Do you cook often?

If your disposal breaks, and it is beyond repair, buying a Costco garbage disposal is the ideal solution. New garbage disposals are generally quieter, more efficient, and more powerful than their predecessors.