Garbage Disposals That Work With Septic Tanks

Gary Johnson
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If you don’t need to install a new sink, buying an Insinkerator will work out well for you. However if all you need is a garbage disposal, check out the Waste King Legend, L-8000 or L-8000 Pro models.

It’s important to note that 800 and 8000 series models may not be suitable for a dishwasher drain connection. If your dishwasher installation instruction manual specifies an Aerator, you may need a more powerful disposal. However, a disposer can be installed over existing Aerator with the proper assembly.

Some models can also be equipped with a stainless steel splash guard to protect it against intense use in an institutional kitchen environment.

Waste King Legend, L-8000 or L-8000 Pro models are the only models with a dishwasher drain connection. All require permanent connections, either a dishwasher drain outlet or Insta-Flange (adapter piece), be used with a dishwasher drain connection. Also, L-8000 and L-8000 Pro models only come in 1/3 horsepower versions, making them not ideal for a dishwasher drain connection.

NameCategoryProduct
InSinkErator Evolution Septic Assist 3/4 HP Household Garbage DisposalBest OverallInSinkErator Evolution Septic Assist 3/4 HP Household Garbage Disposal
General Electric GFC520N Continuous Feed DisposallBudget PickGeneral Electric GFC520N Continuous Feed Disposall
Waste King L-8000 Garbage DisposalUpgrade PickWaste King L-8000 Garbage Disposal

1. InSinkErator Evolution Septic Assist 3/4 HP Household Garbage Disposal

Our rating: 9 / 10

InSinkErator Evolution Septic Assist 3/4 HP Household Garbage Disposal

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Pros:

  • Works with septic tanks
  • Stylish stainless steel design
  • Quiet as compared to other models
  • Quick installation
  • 3/4 Horsepower
  • Lifetime In-Home Service Warranty
  • 2-Year Limited Warranty

The InSinkErator Evolution Septic Assist is one of the best garbage disposals for your home. It is durable, powerful and is made to last a long time.

This disposal has been rated 4.4 out of 5 stars by more than 7,000 customers on Amazon. This appliance is quiet as compared to other models, as it makes less than 1% of the noise most disposals make.

The InSinkErator cost just a bit more than other models, but is worth it due to its advanced features. It is also the best rated garbage disposal for septic tanks, which makes it ideal for those who live in areas where they need to use these systems.

2. Waste King L-8000 Garbage Disposal

Our rating: 9 / 10

Waste King L-8000 Garbage Disposal

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Pros:

  • Does what it’s supposed to – grinds down food waste
  • Not much noise
  • Comes with power cord
  • 20-year warranty

Cons:

  • Can’t handle large bones or tough rinds
  • Pricey

According to the reviews this garbage disposal unit by Waste King, otherwise called the L-8000, does what it’s supposed to, and that’s grind food waste. This unit isn’t the most powerful of disposals with its 1 horsepower motor, but it doesn’t cost a fortune either.

Weighing in at 7.0 pounds this disposal hooks to your sink using an alligator-like door mounted with a flange. This makes it very easy to install and be sure it’s securely affixed to your sink.

3. Moen GX50C Prep Series 1/2 HP Continuous Feed Garbage Disposal

Our rating: 8 / 10

Moen GX50C Prep Series 1/2 HP Continuous Feed Garbage Disposal

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Pros:

  • Convenient electronic push button for easy start
  • 1/2 HP Continuous Feed Plant Exhaust models are autoclavable by design, which is great for busy commercial kitchens that process foods containing harmful bacteria that can break down with heat or produce spores
  • It’s quiet and has a removable splash guard to prevent food from flying out the top of the unit
  • Super easy installation with no need for plumbing
  • High speed 2800 RPM permanent magnet motor for more efficient grinding
  • Durable stainless steel swivel impellers and grind system to prevent jamming
  • 1/4 turn easy mount installation with no tool required for the sink mounting bracket
  • Advanced and superior anti-vibration design for long term durability
  • Compact design fits under cabinets for a more streamlined appearance
  • Waste is disposed into a separate chamber giving you two chambers, allowing it to handle more material and waste easier

Cons:

  • Doesn’t come with a power cord so you’ll need to purchase one separately
  • Power Cord is only 6” long
  • The quietest it gets is still a little noisy

4. General Electric GFC520N Continuous Feed Disposall

Our rating: 7 / 10

General Electric GFC520N Continuous Feed Disposall

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Pros:

  • Continuous-feed is especially helpful for starchy foods and fibrous food waste
  • Excellent customer service
  • Option for corded or cordless operation
  • Easy-to-reach button for operating the reverse function

Cons:

  • Not as good for hard food waste
  • Adjustment knob is tricky to use

Our top pick from among the best garbage disposals that work with septic tanks is the General Electric GFC520N Continuous Feed.

This unit is the best model for continuous-feed operation, which is especially helpful for starchy foods and fibrous food waste. It also features a powerful motor and a 1/2 HP. The addition of a quick-connect cord allows for corded or cordless operation, meaning that you can always have it ready for usage.

As the best septic tank garbage disposal, this unit also features a very powerful motor. This means that you can use it to deal with tough waste materials, powered by a suction vortex. This feature also results in a shorter grinding time, in addition to quieter operation.

5. Frigidaire FFDI501DMS 1/2 Hp D Garbage Disposer

Our rating: 7 / 10

Frigidaire FFDI501DMS 1/2 Hp D Garbage Disposer

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Pros:

  • Sound insulation cover helps with bubbles and noise
  • Permanent magnet motor runs quieter
  • Cast stainless steel grind ring is rust-proof
  • Transparent grinding chamber makes jam-free operation easy to see
  • Quick lock sink mount system for fast installation
  • Comes with a 1 year warranty

Equivalent to 1/2 horsepower, the FFDI501DMS garbage disposal has enough power to handle even the thickest of food waste.

The build quality is excellent and durable. The exterior is made of cast-brass, and the interior is made of stainless steel. The inside is transparent, so you can watch waste moving down the chamber. This allows you to make sure the disposal is running smoothly.

There’s also an insulation cover that comes with the unit to reduce noise and bubbles that often occur when the unit is running. You can also turn this cover upward to stop food from being pushed back into the sink. If you’re afraid of the system getting jammed, then this is definitely very useful and it frees up your time to do other tasks.

Frequently Asked Questions (FAQ)

Are garbage disposals OK for septic systems?

In short, yes.

The power of garbage disposals run off of the water flowing through your kitchen sinks. The easy answer is that, if you can run water in your kitchen then you can run a garbage disposal.

The only problem is that waste from your disposal can sometimes flow back into your pipes if you have a lot of food particles down the drain. This is further complicated by some of the pipe sizes for different houses. In a house with old pipes, the pipes might be too small for a garbage disposal to run without eventually clogging.

In the end, it’s a common misconception that garbage disposals are bad for septic tanks. In fact, all they do is move the waste out of your house, not necessarily out of the septic tank. However, for those who want to avoid additional drains on their septic tank, they might consider some alternatives where possible.

Can you have an InSinkErator with a septic tank?

The short answer is yes. It is possible to have an InSinkErator with a septic tank and it is possible to avoid any negative effects your disposal might cause. The reason is that most of InSinkErators are extremely efficient when it comes to reducing the amount of food waste. Therefore, even if a bit of food waste does come through your pipes and into your septic tank, it's not such a big deal in the big scheme of things.

However, there is one catch worth knowing: don't ever put bones, meat or food scraps into your disposal. Those things will break into the tiniest parts possible you might not even notice. However, they will over time plug up your pipes and cause problems.

What items should not go into a garbage disposal?

Before putting any substances into the garbage disposal, think about if the items will harm the disposal. For example, do not put any of the items on this list into a disposal:

  • Meat or poultry bones
  • Coffee grounds
  • Yeast dough to rise bread or other baked goods
  • Prune pits
  • Citrus rinds
  • Potato peels
  • Grated/finely cut ice
  • Nuts, seeds, and unpopped popcorn kernels
  • Any other substance that is highly fibrous

Are all garbage disposals compatible?

Not every garbage disposal unit will fit your septic system. See the chart above.

If you have a septic tank, then you need to talk to your plumber and get advice on whether your unit is septic-tank compatible or not. Do not buy a garbage disposal unit based on the brand name or the look of the product. As a rule of thumb, there is no reason to even consider a garbage disposal unit that is not compatible with your septic tank.

If your plumber advises you not to purchase a garbage disposal unit, then it’s best to consult a septic-tank contractor to get the green light. You can also call the manufacturer of your current garbage disposal unit for more advice.

Conclusion

Consumers should be aware of certain things prior to buying a Garbage Disposals That Work With Septic Tanks. For instance, some people may not know this, but there is a difference between the construction of a Garbage Disposals That Work With Septic Tanks and other types of Garbage Disposals That Work With Septic Tanks. We will cover this as well as other important factors to consider when buying Garbage Disposals That Work With Septic Tanks in the paragraphs below.

Our Recommendation

NameCategoryProduct
InSinkErator Evolution Septic Assist 3/4 HP Household Garbage DisposalBest OverallInSinkErator Evolution Septic Assist 3/4 HP Household Garbage Disposal
General Electric GFC520N Continuous Feed DisposallBudget PickGeneral Electric GFC520N Continuous Feed Disposall
Waste King L-8000 Garbage DisposalUpgrade PickWaste King L-8000 Garbage Disposal