InSinkErator Septic Assist Review: Best Disposal For Septic Tanks

This article is a review of InSinkErator Evolution Septic Assist garbage disposal.

If you are reluctant to buy a garbage disposal because you have a septic tank system in place, then here is the perfect solution for your needs! InSinkErator Evolution Septic Assist comes with added features specifically designed to be compatible with the septic tanks. A friend of mine bought this disposal a couple of years ago and has been happily using it ever since with a septic tank. So, if you’re wondering whether Evolution Assist is worth your money, then keep on reading this review. 

InSinkErator Septic Assist

InSinkErator Septic Assist

  • Power: 3/4 HP
  • Height:12.625 inches
  • Drain Height: 6.6875 inches
  • Feed Type: Continuous
  • Grinding component: Stainless steel
  • Warraty: 8-years
  • Mount: 3-bolt

Here, I am going to share a lot of insight into this revolutionary disposal. The Evolution Septic Assist is one of the quietest disposals on the market, but does it work? Is it worth the hefty price tag? Is it right for your needs? This review will help you answer these questions and more.

Outstanding features of InSinkErator Evolution Septic Assist

Garbage disposals have changed considerably over the past few years, becoming more efficient and powerful while also being much quieter than they used to be. One example of this change is the InSinkErator Evolution Septic Assist, which features cutting-edge technology that helps you dispose of trash more efficiently and in an environment-friendly way.

Let’s learn more about the features of this disposal that make it a perfect choice for septic tanks.

Dura-drive induction motor

Powered by a heavy-duty ¾ HP Dura-drive induction motor that operates at a speed of 1725 RPMs, Evolution Septic Assist is ready to serve you efficiently. The Dura-Drive induction motor is built to last. It’s strong, smooth, and reliable. So, you can be confident that your Evolution Septic assist will continue working at peak performance for many years to come.

Lift & Latch technology

Evolution Assist features patented Lift & Latch technology, which means you can easily connect the disposal to your sink without any hassle. Just lift the disposal with both hands and latch it onto the mounting ring, and you are done!

PS: Lift and latch is a modified version of the old quick lock sink mount.

MultiGrind technology with GrindShear ring

InSinkErator Evolution Septic Assist uses MultiGrind technology featuring 2-stage grinding that will grind almost anything. In addition, this patented technology is designed with GrindShear Ring. This feature allows you to crush even the most fibrous food waste efficiently, so it breaks down quicker than before, without clogging your pipes or leaking odors into your home.

SoundSeal technology

The exclusive InSinkErator SoundSeal technology makes for quiet operation. Thanks to Anti-Vibration Mount, Anti-Vibration Tailpipe Mount, Quiet Collar, and Sink Baffle SoundLimiter Insulation, Evolution Septic Assist is 40% quieter than a standard garbage disposal. In fact, the InSinkErator brand claims that their products are quiet enough to hold a conversation with them running.

Bio-Charge injection technology

The Bio-Charge injection technology in InSinkErator Septic Assist disposers provides you with all the power and jam-crushing abilities that you would expect from any high-end product. It uses a unique formula that injects 300 million food-breaking microorganisms into the system every time you put it to work. These enzyme-producing microorganisms quickly break down fats, oil, and grease in the septic tank so the tank will never overflow. This is the reason why this garbage disposal is called Septic Assist.

10 Reasons to buy InSinkErator Evolution Septic Assist

If you have a septic tank system for your home then the Evolution Septic Assist can be an incredibly handy addition to your kitchen. This disposal will allow you to quickly dispose of food waste that would otherwise end up in the trash.

Here are ten compelling reasons that will help you decide if Evolution Septic Assist is the right choice for you or not!

Made in the USA

InSinkErator takes pride in offering high-quality and innovative American manufactured garbage disposals to their customers. Their name is synonymous with quality and performance so you can select their products without second thoughts.

A versatile addition to any kitchen

The Evolution Septic Assist is a versatile addition to any sink. It has two grind stages for hard and soft waste, allowing you to do grind the toughest of scraps without causing jams and clogs. The 3/4 HP motor is more than capable of grinding tough food wastes including small chicken bones and fruit pits.

Highest durability

A 40 oz stainless steel grinding chamber and alloy stainless steel grinding components ensure durability by preventing corrosion for a long time. In addition, Evolution Septic Assist comes with a LeakGuard Liner for extra safety against leaks. The solid built of this disposal is its top-selling quality.

Easy installation

Most customers look for disposals that are easy to install, and Evolution Septic assist comes with the most straightforward installation system with Lift & Latch technology and Quick-Lock mounting. These technologies will help you install the unit all by yourself without needing any assistance.

Continuous feed

Evolution Assist’s 2-stage grinding technology and continuous feed ensure that you perform your waste disposing tasks in a more competent and faster way as it lets you grind food waste without stopping.

Quiet operation

This disposal can operate at a whisper-quiet sound level, making it ideal for homes. In addition, the SoundSeal technology also reduces the vibration, ensuring a much quieter experience than other disposers on the market. These characteristics have consistently placed InSinkErator at or near the top of owner satisfaction levels. And even though it’s quieter, it’s also one of the most powerful disposals available today.

Here are some other quiet garbage disposals for you.

Powerful grinding

InSinkErator Septic Assist has a heavy-duty and high-speed motor that makes grinding function faster. It is a powerful food waste disposer designed to grind practically anything that goes down your kitchen drain. This disposal can effortlessly grind and send chicken bones and even watermelon down your drain.

The best option for septic tanks

It is specially designed to be used with septic tanks, so no worries there about its functionality. The Bio-Charge injector also makes it suitable for use with septic tanks as it completely breaks down the high volume of food wastes accumulating in the septic tank. Also, being a powerful grinding machine, Evolution Septic Assist releases liquefied waste into the drainage system which is easier to be decomposed in septic systems.

Environment friendly

The Bio-Charge technology breaks down waste faster for easier decomposition and added convenience, not harming the environment. In addition, evolution Assist makes sure that all your waste is disposed of into the drain system efficiently, thus decreasing the amount of garbage in the landfills. Now you can dispose of your kitchen waste in an environment-friendly way!


Finally, this garbage disposal comes with a lengthy 8-year warranty. InSinkErator ‘We Come to you in-home’ full service limited warranty covers parts and labor. This warranty is an important reason why customers love this product!

Some shortcomings of InSinkErator Evolution Septic Assist

InSinkErator Evolution Septic Assist is a garbage disposal designed to work in homes with septic systems. Still, this unit has some downsides that potential buyers should be aware of before purchasing it. Therefore, this product is suitable only for those who know they will never face any sewage problem in their area and are ready to pay for something extra just for peace of mind.

Despite these drawbacks, we still believe that Evolution Septic Assist deserves our 5 out of 5-star rating due to its overall effectiveness and ease of use. Here are the two most significant downsides of this garbage disposal system.

A high price is not suitable for low budgets

This product has a high price tag that will be difficult for some people to afford. However, with so many inexpensive alternatives, most consumers will choose a disposal that comes in their budget, or they can decide to do without a disposer rather than spend so much on an appliance they won’t use every day.

Power cord not included

The fact that there is no power cord adds to its higher price, especially compared to other products in its category. So, if you choose to connect it directly to a source of electricity, you will need to purchase a separate one yourself. 

Close competitors – InSinkErator Evolution Compact and Waste King L-3200

In comparison with other devices, Evolution Septic Assist’s shortcomings can be a problem for many people who have a tiny kitchen or a limited budget to install a new device in their houses. 

Evolution Compact and L-3200 both have ¾ HP motors that perform the daily grinding tasks for a medium-sized household pretty well. L-3200 is also compatible with an appropriately sized septic tank so that it can be a perfect alternative to Septic Assist in a far less price range.

Both Evolution Compact and L-3200 have a pre-installed power cord which Evolution Assist lacks. Moreover, they have a compact size as compared to Evolution Assist. So, if you have restricted space for installing disposal, then you might consider opting for one of these reasonably priced alternatives without worries.

All three disposals have stainless steel grinding components, making them corrosion-free and durable disposals that will last for years. In addition, InSinkErator and Waste King both make quality products, so you can rest assured about their build quality and strength.

Therefore, if you are not looking for extra features, you can go for cheaper alternatives such as InSinkErator Evolution Compact and Waste King L-3200. Fortunately, these disposals are not that large but still very powerful. Also, you will save money as their price is much lower than that of InSinkErator Evolution Septic Assist.

Customer reviews on InSinkErator Evolution Septic Assist

The Evolution Septic Assist can efficiently handle all your daily chores with added benefits, but don’t forget to look at the customers’ reviews before committing to buying this product.

I have gathered some great and not-so-great reviews so you can select the perfect disposal according to your needs after a thorough investigation. So, here’s what the customers are saying about Evolution Assist:

Positive review

  • It is big, bulky, solid, and very quiet!
  • Wow! Super Quiet! So suitable for my Septic system!
  • Astonishingly noiseless and works wonderfully well on almost all scraps.
  • It’s a solidly built disposal with ultimate performance.
  • If you have a septic tank, just get this unit!

Negative reviews

  • The company doesn’t offer replacement parts for the Bio-Charge system 
  • Enzyme injection system quits working very soon. Useless feature.
  • The disposal part works great, but Septic Assist does not.
  • I will not recommend wasting your money. The septic solution falls out all the time.
  • Poor design. I have repaired it countless times.

So, if you feel satisfied with the percentage of positive reviews to negative reviews and Evolution Septic assist ticks the essential boxes for you, then go for it!


The InSinkErator Evolution Septic Assist has many features that make it an excellent choice for people who want to install disposal with a septic tank system in their homes. For those who wish to reduce their carbon footprint and cut down on their landfill costs, it’s easy to understand why so many environmentally conscious people would love to buy and use this disposal. The unit is also energy efficient and exceptionally durable, ensuring years of continuous use.

InSinkErator Septic Assist

InSinkErator Septic Assist

  • Power: 3/4 HP
  • Height:12.625 inches
  • Drain Height: 6.6875 inches
  • Feed Type: Continuous
  • Grinding component: Stainless steel
  • Warraty: 8-years
  • Mount: 3-bolt

My only concern is the Bio-Charge injector replacement cartridge. According to many customers, it breaks down very often, and you have to replace it. So, once it expires or breaks down, you will have to go through the trouble of purchasing a new one which is an added cost. Other than that, Evolution Septic Assist is a great buy!

If you are not decided and still searching for a new garbage disposal, take a look at my list of best garbage disposals. This list is a collection of the top rated, popular garbage disposals from all power bands created to make your selection process much easier.