Evolution Septic Assist®

Created specifically for homes with septic systems, the Evolution Septic Assist® delivers the new standard in sound and grind performance.

Our powerful food waste disposers are the right choice when replacing an existing unit or designing a brand-new kitchen. You can choose between five Evolution models, including Evolution Compact®, designed specifically for homes with restricted cabinet space.

With an InSinkErator® food waste disposer in your kitchen, chicken bones, fruit rinds, coffee grounds and more can go right in the sink -- where they're virtually liquefied to safely flow into your sewage system or septic tank. You'll enjoy a cleaner food preparation area, and less bagged garbage cluttering your home.

What's more, if you've never owned a food waste disposer, you're in for a pleasant surprise. InSinkErator® disposers are economical to operate: in fact, they're among the least expensive installed kitchen appliances.

Household Disposers and Accessories Brochure


The Evolution Septic Assist® offers the following features:

  • MultiGrind™Two grind stages let you quickly grind difficult food waste you wouldn't put in a standard disposer, like celery and potato peels.
  • SoundSeal® technology delivers quieter performance. Hold a conversation with elevated voices in the same room.
  • 40-Ounce Stainless Steel Grind Chamber and Grind Components handle more volume than standard disposers.
  • Bio-Charge® Injection Technology utilizes a natural microorganism to help break down food waste.
  • 3/4 Horsepower Dura-Drive® Induction Motor gives you more horsepower than standard disposers.
  • Made in the USA
  • Available With or Without Power Cord

The Evolution Septic Assist® has the following Specifications.

Type of Feed: Continuous
On/Off Control: Wall Switch
Motor: Single Phase
HP: 3/4
Volts: 120
HZ: 60
RPM: 1725
Amp. (Avg. Load): 8.1
Time Rating: Intermittent
Lubrication: Permanently Lubricated Upper & Lower Bearings
Shipping Weight (Approx.): 25.5 lbs.
Unit Finish: Black Enamel/Gray
Overall Height: 12-5/8"
SoundSeal Technology:

  • Anti-Vibration Mount®
  • Anti-Vibration Tailpipe Mount™
  • Quiet Collar® Sink Baffle
  • SoundLimiter™ Insulation

MultiGrind Technology: GrindShear Ring®
Injection Mechanism: Bio-Charge®
Grind Chamber Capacity: 40 oz.
Motor Protection: Manual Reset Overload
Average Water Usage: Approx. 1 Gallon Per Person Per Day
Average Electrical Usage: 3-4 KWH Per Year
Drain Connection: 1-1/2" Anti-Vibration (Hose Clamp)
Dishwasher Drain Connection: Yes

Installation Care and Use Manual

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InSinkErator may make improvements and/or changes in the specifications at any time, in its sole discretion, without notice or obligation and further reserves the right to change or discontinue models.


WarrantyWe Come To You® In-Home Limited Warranty

Please see the warranty details specific to this model.

All InSinkErator® models provide in-home limited warranties. That means We Come to You whenever your InSinkErator® food waste disposer or hot water dispenser needs service within the warranty period. To schedule a service call, click here, or just dial 1-800-558-5700, press 2, and enter your five-digit zip code. We'll provide you with the name and phone number of the factory authorized service agent nearest you. It's that simple.

Our We Come to You Warranty means we handle your service problems at your convenience in your home. The InSinkErator® We Come to You In-Home Limited Warranty. It's another InSinkErator® exclusive.

The above is a summary only. Please access the PDF to the right of this summary for a copy of the complete  Limited Warranty. Other conditions may apply.

In The Box

Evolution Septic Assist® - what's in the boxEvolution Septic Assist® — Retail Box Contents

  • Quick Lock® Sink Mount
  • Quiet Collar® Sink Baffle
  • Jam-Buster™ Wrench
  • Anti-Vibration Tailpipe Mount™
  • Anti-Vibration Mount®
  • Stainless Steel Sink Stopper
  • Bio-Charge® Injection Technology

Rated 4.8 out of 5�by 82 reviewers.
Rated 5 out of 5�by quiet Love the quietness of this disposal. Would highly recommend January 7, 2014
Rated 5 out of 5�by This product is made specifically for septic systems. This product is very easy to install. It does a great job and runs very quietly. I would recommend this product. December 28, 2013
Rated 5 out of 5�by Very Pleased The insinkerator is quiet and thorough. We've had it almost a year and have no problems. We're pleased that we can have a septic system and still have a garbage disposal. December 23, 2013
Rated 5 out of 5�by This is so important to have with the septic system Grinds well, quieter than previous model. Liquid lasts much longer than I expected. December 21, 2013
Rated 5 out of 5�by Very quiet unit. Extremely easy instillation for novice plumber. We bought the septic system saver feature model. Solution last a long time. Really like how quiet and powerful unit is. December 20, 2013
Rated 5 out of 5�by Perfect for those of us on septic systems We've been, over the years, slowly remodeling our 1926 farmhouse, built when there wasn't even electricity in the area. When we got around to the kitchen, we wanted all the conveniences, that included a dishwasher (other than one of us) and a garbage disposal unit. Being on a small flow sewage treatment facility, basically a house sized treatment plant, limited us to what we could install that wouldn't give the system "heartburn". This InSinkErator Evolution Septic Assist unit certainly fills the bill. The unit was easy enough to install and operates flawlessly. Incredibly quiet and fairly stingy with the tank of "bugs" that it injects when used. We've been using it now for about 6 months and haven't used half a bottle; it was a bit of a concern to us as to how much "consumable" it would use, but, we're quite happy with the unit and its function. Well done InSinkErator! December 18, 2013
Rated 5 out of 5�by This product is quiet, has no odor, and functons perfectly. We dreaded having to replace our old food disposal. But thank goodness for the Evolution Septic assist food disposer. The instructions are simple, and straight forward. The old unit was out, and the new unit in less than an hour. The new unit has no foul odor in between uses, thanks to the odor control. It is very quiet when in operation. We can recommend this product to anyone. December 13, 2013
Rated 5 out of 5�by The Insinkerator is quiet and very efficient. Really like it Fast, efficient, and quiet. Will recommend it to anyone who has a septic tank. No problems with the tank. It took me 46 years to convince my husband that we need a disposal. Now, he is using it with no hesitation. December 13, 2013
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