7 Best Garbage Disposal for Septic

In the past, we depended on the municipal sewerage system. On the contrary, today, more houses rely on the septic system. This means that the garbage disposal is attached to the septic system.

The garbage disposal has been a savior for many in regards to maintaining kitchen cleanliness. Today you don’t have to worry about clogs on the pipes caused by accidentally dropping the scraps in the sink.

Best Garbage Disposal for Septic

I must say, for those living outside of the US, this feels like the best dream to have. It’s rare to find homes without garbage disposal. However, septic systems are also standard. So, what happens when you have a septic system, and you want the garbage disposal?

Most people who have septic systems are afraid that the tanks can’t take too much water that the garbage disposal uses. They feel that the tanks would fill sooner than they should or even clog.

Well here’s the thing, your concern is 100% legit. But then you shouldn’t worry, there are powerful garbage disposals that can work with your septic tank and that’s what we will show you today.

Waste King L-8000 Garbage Disposal with Power Cord
  • HIGH-SPEED MOTOR: The 1 HP, 2800 RPM permanent magnet motor is sound-insulated and jams less. Drain Connection Size: 1 1/2 inches
  • EASY INSTALLATION AND CLEANING: EZ Mount for a quick and easy kitchen sink installation, removable splashguard for easy cleaning
  • LIFETIME PROTECTION: Lifetime Limited In-Home Warranty

Can the Garbage Disposal and The Septic System Work Together?

You will notice that of all the garbage disposals we choose here, if they are going to work well with your septic tanks then they should grind the food waste thoroughly.

The essence of this is to make sure it doesn’t clog the pipes leading the waste to the septic tanks. It also stops the possibility of overwhelming the septic tank bacterial breakdown system as this may cause build-up and ultimate damage.

The good thing is that the bacteria will manage the tiny waste pieces. So, the garbage disposal should work at a high ratio per minute and a high Hose power. This makes it easy to break down the waste fast.

What Makes A Good Garbage Disposal Unit for The Septic System.

Notice that you are not draining your waste to the city sewage; therefore, you must protect your septic tank. It’s the one piece that is vital in a house. Remember you can’t clog it or else you will spend a lot of money making it.

So below are the qualities to look for.

Septic system ready

Whenever you want to buy garbage disposal, only make sure they mention that it is compatible with the septic tanks. Any item without this indicator is a no-no for you. Luckily there are garbage disposals made solidly for the septic system and not for the regular plumbing.

They come with the bio pack ready for you to use with the microorganism treatment. Buying such disposals is a plus because it makes your work easy. It will break down the microorganisms fast.

What’s the size?

It all depends on the size of the septic tank when you are buying the garbage disposal. If you have a large-sized septic tank, it’s okay to buy a large-sized garbage disposal. It makes it easy to flush off the waste from the disposal in large quantities without clogging the system.

Also, the good thing about buying a space-saving unit is that it allows space for processing.

Which feed is better?

You may be in love with the continuous feed, but it’s not the best when you are using the septic tank. You will need a batch feed when you are using the septic tank.

The continuous feed works by running the disposal every time you clean. So, the batch feed will reduce the amount of waste that goes into the tank every time. In fact, it even works best if you have a smaller system.

The grinding ability

While we have the HP of most of the garbage disposal units being ½ HP it can work even if it had 1/3 HP. The only challenge is to have a high rotation speed of 2600RPM. If you can have a motor that will reach the full speed fast, then that’s even better.

The size of the chamber matters too if it is compatible with the septic tank size.

What is the waste size you usually produce?

If you have a big family, you will most likely create more waste than a small family. So, the primary factor of concern is how much food you prepare at a time. That will show you the exact amount of waste you produce.

So, if your family produces large wastes, you should buy a more powerful and large disposal unit. But if you only produce a little waste go for a less powerful unit.

The motor

This is an essential factor. It will guide you in managing the waste. So, a motor that operates at a high speed creates lesser waste than the one that works at a slower speed.

Are Garbage Disposals Bad for Septic Systems

Today more homeowners indeed have a septic system. Whether it’s a personal choice or something they are forced to do because of the conditions is something we are yet to find out.  However, all we know is that more people are using them.

These tanks can last over 40 years with proper care and maintenance. It needs you to sieve through what you know is going into the septic tank. Some things may cause clogs or damage the pipes, thereby causing massive damage to your whole system unit.

For this reason, not many people are sure whether the septic tank would work well with the garbage disposal. The truth is that if you don’t use the garbage disposal for the right reason, you might cause so much damage to the whole system.

So, here’s the problem:

While the garbage disposal makes it easy to keep the kitchen clean, it could ruin your septic tank if you aren’t careful. This is especially true if the disposal doesn’t grind the food into tiny little particles. It happens because this waste that you grind down is deposited in the septic tank.

Now, septic tanks don’t allow you to send solid items down to it. When you send hard leftovers, you eventually risk damaging them.

Often, they will lead to the formation of the sludge. If the bacteria in the tank is unable to break down the solids, the solid settles down on the tank.

They cover the bacteria making it hard to break the solids. It then affects the septic tank capacity as it reduces the availability of the bacteria to break down the waste.  In the end, the septic becomes unsafe and leads to the ultimate collapse.

The problem occurs when the waste or solids can’t stick on suspension for a longer time to allow the bacteria to work on them.

The solution

This is not to say that the garbage disposals can’t work with the septic tanks. They can if you follow a few rules.

Only use the garbage disposal that is designed to work with the septic system

If you buy the right garbage disposal, it will use its enzymes to break down the food waste even further. They solidly minimize the food particles making them efficient and helping them to work with the septic tank.

So which food can you dispose of?

If you have a septic tank, I’m sorry, you don’t have a long list of food items that you can discard the same way you do if you have the shared sewer system. As for the septic system, you won’t drain down every kind of food at your disposal and expect it to work on it.

If you have large and tough pieces don’t dispose of them rather throw them in the trash can. After all, you want your septic tank to last longer. Also, only dispose of biodegradable food items.


You will need to maintain it regularly. This helps to avoid unprecedented cases of breakdowns. Use some dish soap and clean water to clean the disposal every so often. Also, seek the help of a professional to make sure you pump the septic tank regularly.

You can pump it after a year or two. Ensure everything is sealed throughout the whole process.

So, unlike most thoughts, the garbage disposal is not your trash can, especially when you are using the septic system. Since you want the bacteria to do its work, maybe you should avoid putting on hard bones and veggies.

If you install a garbage disposal and you what the septic tank system, don’t use the garbage disposal every day. That will damage the septic tank. Use it occasionally, and that’s why you need the batch feed method.

If you are having just little pieces of waste food, you can drain them into the sink. But if you have large pieces, consider pouring them into the trash can.

What you should never pour into the garbage disposal

  • Never pour out oils to the garbage disposal and ultimately to the septic tank. It will suffocate the bacteria thus killing them.
  • Bones, fruit pits, or seeds: large and hard bones, avocado seeds are among some of the things that will damage the garbage disposal. So, if it accidentally falls in, switch off the power and remove it fast.
  • Eggshells: its membrane can easily wrap around the garbage disposal and damage the pipes.
  • Nonfood items: the garbage disposal is for food items, not papers or any other non-food items. Be sure you only drop food items in the garbage disposal.
  • Coffee grinds: we all love coffee, but its grinds are damaging to the disposal. They will form sediment below the garbage disposal. This is eventually detrimental.
  • Potato peels: over time, they could cause a mess. Some people dispose of them but it’s not a good idea.
Product nameProduct imageHPStar ratingPrice
InSinkErator Garbage Disposal, Evolution Septic Assist¾ HP4.5/5Check price
Waste King L-8000 Garbage Disposal1HP4.3/5Check price
Waste King L-3200 Garbage Disposal¾ HP4.3/5Check price
InSinkErator Garbage Disposal, Evolution Excel,1HP4.7/5Check price
General Electric GFC520V garbage disposal½ HP4.2/5Check price
Waste King Knight A1SPC Garbage Disposal1 HP4.0/5Check price
Moen GX50C GX Series Garbage Disposal½ HP4.3/5Check price

1. InSinkErator Garbage Disposal, Evolution Septic Assist

InSinkErator Evolution Septic Assist 3/4 HP Household Garbage Disposal

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You can never doubt when you use the InSinkErator brand for garbage disposal. Most of the disposals they make are septic-friendly. Nevertheless, when you have this garbage disposal it’s even better because it’s designed to work with the septic tanks.

It usually has the bio charge to break down the waste in the septic tank even more. It has a 2 stage multi-grinding technology to make sure you grind the food even finer. This means that it will handle the waste better.

With its 3/4HP and the dura motor, it will grind even the toughest food to the level where it can’t damage the septic tank. So, it reduces the chances of jamming and clogs that may happen in the septic tank of disposal cans.

It further has the alloy stainless steel for the grinding components, which makes it not only practical but also durable. The brand is a champion at making the garbage disposals work silently. It has a sound seal technology that keeps the noise to a bare minimum.

2. Waste King L-8000 Garbage Disposal with Power Cord, 1 HP

Waste King Legend Series 1 HP Continuous Feed Garbage Disposal with Power Cord - (L-8000)

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Another one of the best brands when it comes to making garbage disposal is the Waste King. Most of its disposals are made compatible with the septic tanks. This works at a high speed of 2800RPM and 1HP.

This makes it the right choice because it will grind the food down to the tiniest particles. It has all the stainless-steel grind components making it a more durable option. Although, it uses the continuous feed method.

It has a removable splashguard which makes it easy to clean. If you dropped items in it by mistake, you could easily remove them before you begin grinding.

It also has a sound shielded technology that makes the noise minimal. Just make sure you have the right size of the septic tank before you begin to work with it.

3. Waste King L-3200 Garbage Disposal with Power Cord, 3/4 HP

Waste King L-3200 Garbage Disposal with Power Cord, 3/4 HP , Gray

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This is a much smaller size than the garbage disposal. The size makes it suitable for those with small kitchens needing to minimize the space. It’s also ideal if you have a small size septic tank.

This item has a high speed and breaks down food fast enough and to tiny pieces making it compatible with the septic tank system. It works at 2700RPM and 3/4HP. The way it works makes it reduces the cases of jamming and clogging.

It has its vital grinding components made of stainless steel. It’s a strong polymer that makes it corrosion-resistant and thus durable. For the installation, you need no professional because it’s easy to install.

Just make sure you have the rightful septic tank when you are choosing to use it with the septic tank. You can use a sink-mounted air switch to activate this waste king garbage disposal. The splash guard makes it easy to clean its interiors.

4. InSinkErator Garbage Disposal, Evolution Excel, 1.0 HP

InSinkErator Garbage Disposal, Evolution Excel, 1.0 HP Continuous Feed

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I am a fan of the InSinkErator garbage disposal, and they have never disappointed me. They are more than you need for garbage disposal. To begin with, this is the quietest garbage disposal we have so far.

With its sound seal technology, there’s barely any noise as it’s working on the food waste. What’s more, it’s a powerful item that has a 1HP for the powerful grinding of the food. It further uses the dura induction motor.

Also, it has stainless-steel components for the grinding process. It takes the food through 3 multi-grind stages to ensure it breaks the food down into very tiny pieces. It further has the jam assist in ensuring you will not experience any form of jamming.

As long as you determine the size of your septic tank, it works effectively with it. You won’t have clogging experiences because it grinds all the food, including the hard particle to the tiniest pieces. You can also connect it directly to the dishwasher if need be.

With the jam sensor, you have reduced the jamming possibility by over 500%.

5. General Electric GFC520V garbage disposal

GE Continuous Feed Garbage Disposal, 1/2 Horsepower, Good for Grinding: Beans, Potatoes, Peels, & Cooked Meat, Easy Install Kit Included, Non-Corded, Recommended for 2-4 Person Homes

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The garbage disposal will make it easy to get rid of the food waste keeping your kitchen clean and fresh. With ½ HP you can have it grind the food waste to small particles in seconds then push it down to the septic tank especially if it’s the right size.

It uses the insulation package to reduce noise during the operation. Thus, you don’t have to dread the grinding process. You can use the air switch to control the disposal. Made of stainless steel the item is durable.

It has a large capacity to handle family-size waste. Its blades are also not affected by jams. The splash guard is removable, which makes it easy to clean it. It uses the continuous feed method and it’s effective in your kitchen and with the septic system.

6. Waste King Knight A1SPC Garbage Disposal 

Waste King Moen Knight A1SPC 1HP Garbage Disposal with Power Cord and Exclusive Silencer Technology, 1 HP, Stainless Steel

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One of the most vital garbage disposals in the market today is this one. It’s compatible with septic tanks. With 1HP and running at 2800RPM, you can expect the food waste to be reduced to liquid by the time it goes to the septic tank.

I like that it works quietly using the soundproof technology that waste king has been installing in their disposals. It uses insulated stainless steel components for the process. Its grinding chambers are further made using glass-filled nylon.

It has stainless steel swivel impellers that reduce the jamming chances. It’s safe to use with the proper sizes of the septic tank.

7. Moen GX50C GX Series Garbage Disposal

Moen GX50C Prep Series 1/2 HP Continuous Feed Garbage Disposal with Sound Reduction, Power Cord Included, Black

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Do you ever wish to keep your sink clean but you don’t know how you can do it? Here is the garbage disposal you can use. With its ½ HP and 2600RPM, it’s powerful enough to grind the food down making it safe to drain into the septic tank.

It comes with a pre-installed cord, which makes it a cheaper option. Additionally, it reduces the time you have to spend looking for a compatible power cord. Its vortex motor will work at high speed the moment you switch it on. This shortens the grinding process.

Also, with its high performance, you don’t expect any form of jamming. Its removable splash guard makes it easy to clean the item. It’s also tiny garbage disposal which makes it fit under the kitchen sink.

Is It Necessary to Have the Garbage Disposal When You Have A Septic Tank?

It’s not mandatory, but it’s beneficial. Always choose the one that is meant for use with the septic tanks. Often, they even come with a bio charge to enhance the breakdown of the food.

Some people don’t understand the essence of the Bio charge since the septic tank has the bacteria to do the work for you already. It helps to keep the disposal smelling fresh. This will mean that you maintain the ambient environment in the kitchen even with the leftovers.


How long will my garbage disposal last?

If you take proper care of it and don’t use it as a trash can, it should last at least 7 years. You may need to replace the dull blades or motor during this time though.

If I have a dishwasher, must I have a disposal?

Not necessarily, although it will be directly connected to the disposal if you have one.

My garbage disposal stinks, how do I clean it?

If you don’t have the bio charges, then the garbage disposal may stink from time to time. To maintain the freshness, run the citrus pills and ice cubes in the disposal.  Otherwise, you can find disposer cleaners to keep it fresh.

What should I do when the garbage disposal is leaking?

Most likely the disposal is not rightfully attached. So, you need to tighten its parts. Alternatively, seek professional help to install it right. Go on to check if the leak is a result of the manufacturing flaw and if it is, use your warranty to get a better one.