Best Under Sink Garbage Disposal Reviews 2018

by Andy

Best Under Sink Garbage Disposal Reviews 2018

by Andy

by Andy
Best Under Sink Garbage Disposal

As far as kitchen inventions go, the Best Under Sink Garbage Disposal is easily one of the best and most widely used. Instead of having to throw away leftovers and create a potential biohazard, you simply toss them into the sink and flip a switch, thereby washing your hands of any further responsibility.

For most households, the disposal is the lifeblood of the kitchen, meaning that if it ever stops working or breaks down, then you have to work quickly to replace it or fix it, lest the backed up food turn into something that would work as a science fair project.

So, to help you avoid such an unpleasant situation, we are here to tell you about the best garbage disposals you can find, as well as provide you with a quick overview guide of features and benefits so that you know which one will work best in your home.​

​Best Under Sink Garbage Disposal comparison chart​​​

Product Picture

Product Name

Editor Rating



Waste King L-2600

garbage disposal

4.3 out of 5

InSinkErator Badger 5 garbage disposal

4.5 out of 5

Waste King 9930 Legend Series

4.8 out of 5

Kitchen Aid KCDB250G Continuous Feed Garbage Disposal

4.5 out of 5

General Electric GFC520V

4.5 out of 5

How to Choose a Best Under Sink Garbage Disposal


Considering that these handy machines install underneath your sink, you will have to pay attention to any size limitations that come with the territory. Usually, what that means is that you might try to get the biggest and most powerful disposal you can find, only to discover that it’s too tall or wide for your sink, meaning that you have to start your search all over again. Thus, be sure to measure your current unit (if you have one) and then the total space you have under the sink. This way, you won’t have any buyer’s remorse.


One of the most annoying things in the world is if you have a disposal that can barely handle any amount of food without clogging. If that is the case, then what’s the point of having a disposal in the first place?

An excellent way of know if the unit will be able to process your leftovers with ease is to pay attention to the horsepower. Now, this is not a completely accurate method for testing how powerful a disposal is, as other things like flow rate (CFM) and rotations per minute (RPM) can affect the performance of your disposal. However, with all things being equal, getting a model with a higher horsepower can indicate that it will be able to power through more food, as well as handle thicker and more fibrous products overall.

Grinding Stages

As another way to ensure that clogging doesn’t occur, some disposals will have a multi-stage grinding system, which means that the food gets chewed up much more than normal, thereby creating a smooth working process, and reducing the chance of any clogs happening further down your pipe. If your disposal doesn’t grind everything well, then bits and pieces could collect in your pipes, meaning that you could experience backups even though your disposal seems to be working fine.


When talking about materials for disposals, the most important components are the impellers and the housing. While other internal components are also necessary for proper disposing, they will usually not come into contact with the water or the food itself.

Stainless steel is one of the best materials to get, as it will resist rusting and won’t dull too easily. In fact, stainless impellers will last for up to a decade without any significant problems, provided that you’re not tossing things like bones, fruit peels, and silverware into your sink beast.

Another suitable material is galvanized steel, but this will rust over time, so you will have to keep that in mind and pay attention to when it starts happening, as that will indicate that you need a replacement ASAP.

Recommended Top 5 Under Sink Garbage Disposals

To help keep things relatively equal when comparing different models, we are going to stick to ½ horsepower disposals. This way you aren’t tempted to pick the unit with the most horsepower, believing it to be the best. As we mentioned above, flow rate and RPM can have just as much impact, so pay attention to those more than the horsepower.

1. Waste King L 2600

As far as disposal brands go, one of the top two is Waste King (the other being InSinkErator). The L 2600 model is one of the better offerings from this company, with high-quality components and top-notch performance year after year.

The first thing that we like most about this disposal is that it operates at a blazing 2600 rpm, which is fast enough to turn most food into pulp within seconds. That, coupled with stainless steel impellers, means that you shouldn’t experience any significant problems with this disposal for years to come.

The other thing that we appreciate about this unit is that the whole thing is made with the best materials. In fact, Waste King guarantees that everything is rust and corrosion proof,

and the company is willing to back it up with more than just words. The L-2600 (along with all Waste King disposals) comes with a lifetime warranty against corrosion, so if any mechanical pieces start to rust, you can trade it in for a replacement.

Other features that we like about this disposal are the quick mounting system, the removable splash guard (for easier cleaning), and the fact that it comes with a power cord. Most disposals don’t include a power cord, so this means that you should be ready to go out of the box, even if you’re installing a disposal for the first time.

Finally, this particular model comes with a five-year in home service warranty, which, when coupled with the lifetime corrosion warranty, means that you should be able to get a ton of use out of this model.


  • Powerful ½ horsepower motor
  • Rotates at 2600 rpm
  • Insulated to reduce noise
  • Durable stainless steel components
  • Rust-free and corrosion-proof materials
  • 36-inch power cord included
  • Quick mounting system
  • Removable splash guard provided for easy cleaning
  • Five-year in-home service warranty


  • Not as powerful as other models
  • In rare cases, leaking can occur
  • On rare occasions, the system can get clogged easily

2. InSinkErator Badger 5

As we mentioned above, Waste King is one of two well-known brands, with InSinkErator being the other one. For our money, we actually prefer InSinkErator products overall, because the company has made some of the best disposals in history. One of the most popular models is the Badger, which is why it’s included on this list. Also, most InSinkErator disposals are more than ½ horsepower, so keep that in mind.

The first thing that we like about the Badger 5 is that it comes with a powerful Dura-Drive motor to grind through food as quickly and smoothly as possible. Also, having a high-performance motor also means that it’s less maintenance and won’t overheat or break down as often as other models.

The other thing we appreciate about this disposal is that it comes with a high-capacity grinding chamber, meaning that you don’t have to turn it on as often to avoid getting clogged. Although this one has just one grinding chamber, it’s more than enough to puree any food you put into it.

Other features that we like about this disposal are the stainless steel impellers, the 30 CFM flow rate (which is high), and the Quick Lock Mounting System. In fact, InSinkErator has made sure that anyone who sticks with the brand will have a remarkably easy installation process, as each model is built to fit into the same mounting bracket, thus making it super quick to replace an old unit.

Finally, this disposal is insulated to reduce noise and comes with a two-year in home service warranty.


  • Powerful ½ horsepower Dura-Drive motor
  • Large 26-ounce grinding chamber
  • Galvanized steel components
  • Compact design
  • 30 CFM flow rate
  • Quick-lock mounting system
  • Insulated to reduce noise
  • One-stage grinding system
  • Two-year in-home service warranty


  • No power cord included
  • Can still be loud
  • May vibrate a lot in some situations

3. Kitchen Aid KCDB250G

When most people think about KitchenAid, they imagine products like blenders and toasters, but not necessarily garbage disposals. Nonetheless, while this type of thing is a little outside of the company’s wheelhouse, they do a good job of building a high-quality disposal.

When compared to something as robust as the Waste King, it’s easy to notice the shortcomings of this disposal. The rpm of this particular unit is 1725, compared to the 2600 rpm above. However, this model still comes with stainless steel components and a compact design, meaning that it’s a quick and easy replacement, not to mention cost effective.

Overall, we would recommend this disposal for kitchens that don’t process a lot of food. So, if you’re not a big food waster, then this could be a great addition to your sink.

We also like that it comes with overload protection and a master switch to turn it off in case there are any problems.

Finally, although the mounting system is not as streamlined as something like InSinkErator, it is still relatively simple, meaning that you should be able to get up and running within about an hour or less.


  • Powerful ½ horsepower motor
  • Operates at 1725 rpm
  • Durables stainless steel construction
  • Compact design
  • Overload protection included
  • Master switch for easy on/off
  • Easy mounting system


  • No power cord included
  • Some users may find installation to be tricky
  • Not as large as other disposals
  • May get clogged easily if not careful

4. General Electric GFC520V

Next, we have another model from a company that wouldn’t typically come to mind when considering garbage disposals. On paper, this design looks like it would easily uproot either Waste King or InSinkErator with regards to being the best ½ horsepower model, but in practice, it does have a few kinks.

First of all, the speed of this motor is incredible. It operates at a whopping 2800 rpm, which is more than any others we’ve seen in this class. That, coupled with stainless steel impellers, means that it should go through food like nothing else. On top of all that, it comes with a proprietary “anti-jam” design to help prevent clogging.

Secondly, this disposal has a large-capacity tank and a secure mounting system, which means that it can process more food at once and shouldn’t be too hard to install.

 As we said, on paper, this disposal seems like the best thing ever.

As for downsides, however, rust is one of the most common issues that people have, along with a mounting bracket that doesn’t hold the unit in place as sturdy as other brands, meaning that you do have to worry about vibration or shaking as it operates. Finally, it is much louder than other disposals (2800 rpm, remember), and it doesn’t come with a power cord.

Overall, this is a great disposal when everything works properly, meaning that it could be a perfect addition to your kitchen. With that in mind, however, don’t assume that everything will work all the time. With some upgrades, this could easily be our number one pick.


  • Powerful ½ horsepower magnet motor
  • Operates at over 2800 rpm
  • Large capacity tank
  • Galvanized steel components
  • EZ mounting system
  • Durable stainless steel blades
  • Removable splash guard for easy cleaning
  • Anti-jam design
  • Compact and relatively lightweight
  • Manual reset with overload protector
  • Dual-level operation
  • One-year limited warranty


  • Some components may be prone to rust
  • No power cord included
  • Mounting system is not as stable as other brands
  • Can be loud

5. Waste King 9930 Legend Series

Closing up our list is another model from Waste King; the 9930 Legend Series. With a name like that, you may think that this is an upgrade from the L-2600 above; however, it’s just the opposite. That’s not to say that this is a bad model by any means, but when comparing the two, the L-2600 comes out ahead with regards to performance and reliability.

When talking about power, this disposal still spins at 2600 rpm, which is again more than enough to process most food. It also has stainless steel impellers, and everything is rust and corrosion-proof, as illustrated by the lifetime warranty that comes with the disposal.

The unit itself is a bit shorter than the L-2600 and still comes with a quick mounting system, which makes installation much easier. Everything is insulated to reduce noise, and it also comes with a five-year in home service warranty.

When looking at the two Waste King models, it should seem like they are identical, but, unfortunately, this particular unit has been known to leak and/or break down more often than the L-2600. There’s no guarantee of that happening, but just know that it’s gotten more complaints.


  • Powerful ½ horsepower motor
  • Operates at 2600 rpm
  • Durable stainless steel components
  • Rust-free and corrosion-proof
  • Quick mounting system
  • Removable splash guard for easy cleaning
  • Three-foot power cord included
  • Insulated to reduce noise
  • Compact design
  • Five-year limited warranty
  • Lifetime warranty against corrosion


  • Installation can be tricky for some users
  • Instruction manual can be hard to follow
  • May vibrate a lot at times and be loud
  • May develop leaks on the bottom

Final Verdict

Overall, when picking out our top pick for a Best Under Sink Garbage Disposal, we have to say that your best option still has to be the Badger 5 from InSinkErator. The power, performance, and low-maintenance design of this unit is better than anything else we’ve seen, and it has one of the best service warranties you can find, even if it’s not as long as Waste Kings. If, for whatever reason, you have an aversion to InSinkErator products, then the L-2600 is another fantastic model.

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