Living with a septic system comes with its own unique set of considerations, especially when it comes to your kitchen sink. Throwing just any old food scraps down the drain can spell trouble for your septic tank, leading to costly blockages and maintenance headaches. But what if you could enjoy the convenience of a garbage disposal without stressing your septic system?
You’re in luck! Modern technology has brought us specialized disposals designed specifically for homes on a septic system. These units often feature advanced grinding mechanisms and even enzyme-injecting technology to help break down food waste more effectively, making them safer for your tank. Finding the best garbage disposal for septic 2021 can seem daunting with so many options out there, but we’re here to help you navigate the choices.
We’ve rounded up seven top-rated garbage disposals and a crucial accessory that are perfect for homes with septic systems. We’ll break down their features, pros, and cons to help you make an informed decision and keep your plumbing happy!
Our Top Picks for the Best Garbage Disposal for Septic 2021
Here are the disposals that stand out for their performance, durability, and septic-friendly features:
InSinkErator Evolution Septic Guard 3/4 HP Garbage Disposal
The InSinkErator Evolution Septic Guard is specifically engineered to be a friend to your septic system, not a foe. What makes it truly shine is its integrated Septic Guard liquid formula injection system. This non-corrosive, scientifically proven solution works tirelessly to support the digestion of solids, actively helping to break down food waste buildup in your septic system and pipes. Plus, it features Quiet SoundSeal technology, so you get all that advanced performance without the usual grinding racket.
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Key Features:
- Integrated Septic Guard liquid formula for enhanced waste breakdown in septic systems.
- Quiet SoundSeal technology for significantly quieter operation.
- DIY EZ Connect installation with Lift and Latch technology.
- Boost accessory for connecting to dishwasher inlet.
- Septic Guard liquid has a fresh citrus scent to reduce odors.
- Backed by a 9-year limited “We Come to You” warranty.
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Pros:
- Specifically designed and proven for septic systems.
- Extremely quiet operation.
- Helps reduce kitchen sink odors.
- Easy DIY installation.
- Excellent long-term warranty.
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Cons:
- Septic Guard solution requires refills, an ongoing cost.
- EZ Connect Power Cord sold separately.
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User Impressions: Customers rave about how quiet this unit is and appreciate the peace of mind the Septic Guard system provides for their septic tanks. Many find the installation straightforward, making it a popular choice for homeowners.
See it on Amazon here
InSinkErator Power .75HP, 3/4 HP Garbage Disposal, Power Series
The InSinkErator Power .75HP offers robust performance with a keen eye on preventing clogs – a huge bonus for septic users. Its 2-Stage MultiGrind Technology is designed to break down even tough food scraps into finer particles, which is much easier for your septic system to process. With a durable Dura-Drive induction motor and a compact design, it’s a powerful yet space-saving solution that delivers reliability day in and day out.
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Key Features:
- 2-Stage MultiGrind Technology for finer grinding of food scraps, preventing clogs.
- 3/4 HP Dura-Drive induction motor for maximum durability.
- DIY EZ Connect installation with Lift and Latch technology.
- Reduced noise levels compared to standard disposals.
- Space-saving design fits easily under most sinks.
- Removable baffle for easy cleaning.
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Pros:
- Excellent grinding power reduces septic strain.
- Durable motor ensures longevity.
- Quieter than many other disposals.
- Compact size is great for smaller under-sink spaces.
- Easy for DIY installation.
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Cons:
- Does not include the Septic Guard system internally (can be paired with a separate BOOST system).
- 6-year limited warranty is good, but not as long as some Evolution models.
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User Impressions: Users frequently praise this model for its strong grinding capability and how effectively it handles tough food waste. They also appreciate its quieter operation and the ease of installation.
See it on Amazon here
InSinkErator Power 1HP, 1 HP Garbage Disposal, Power Series
For those who generate a lot of food waste or simply demand top-tier performance, the InSinkErator Power 1HP is an absolute powerhouse. Featuring a 1 HP motor, this disposal chews through virtually anything you throw at it with ease. While not explicitly designed with an internal septic treatment system, its superior grinding power creates very fine particles, which is inherently better for septic systems than larger chunks. It also boasts reduced sound and a compact design, making it a robust yet manageable kitchen appliance.
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Key Features:
- Powerful 1 HP motor for handling tough food scraps.
- DIY EZ Connect installation with Lift and Latch technology.
- Reduced noise levels compared to standard disposals.
- Space-saving design for easy under-sink fit.
- Power Grind feature for demanding food waste.
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Pros:
- Exceptional grinding power to prevent clogs and ease septic processing.
- Relatively quiet for a high-powered unit.
- Easy DIY installation.
- Durable InSinkErator build quality.
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Cons:
- Higher upfront cost due to 1 HP motor.
- Does not include specific septic treatment features, relying on sheer grinding power.
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User Impressions: Homeowners with large families or those who cook frequently love the sheer power of this disposal. They report it handles everything with ease and appreciate the quieter performance for a 1 HP unit.
See it on Amazon here
1 HP Garbage Disposal with Sound Reduction, TECASA Food Waste Disposer
The TECASA 1 HP Garbage Disposal is a fantastic option for larger families or kitchens that produce a significant amount of food waste daily. Its powerful 2800 RPM motor delivers instant, high-torque grinding, ensuring that food scraps are pulverized efficiently before entering your septic system. What truly sets it apart is its comprehensive noise reduction features, including thick sound-dampening foam, making it a surprisingly quiet behemoth.
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Key Features:
- Powerful 1.0 HP, 2800 RPM motor for efficient grinding.
- Turbine-forced water pressure technology for cleaner draining.
- Custom-formed thick sound-dampening foam and polymer shell for significant noise reduction.
- Safety features: overload protection and accessible reset button.
- Continuous feed operation (requires external switch).
- Pre-installed 39″ power cord for easy electricity connection.
- UL Listed for safety.
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Pros:
- Excellent power and torque for heavy-duty grinding.
- Impressive noise reduction for a 1 HP unit.
- Durable construction suitable for most home kitchens.
- Safety features provide peace of mind.
- Comes with a pre-installed power cord, simplifying installation.
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Cons:
- Continuous feed requires an extra switch (not included).
- Brand might be less recognized than InSinkErator.
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User Impressions: Users are impressed by the TECASA’s grinding power and how quietly it operates despite its strength. The pre-installed power cord is often highlighted as a significant convenience during installation.
See it on Amazon here
InSinkErator Badger 5 Garbage Disposal with Power Cord 1/2 HP
The InSinkErator Badger 5 is a classic workhorse, known for its affordability and reliable performance. While traditionally a more basic model, this specific package comes bundled with the InSinkErator BOOST System with Septic Guard (BST-SG). This means you get the tried-and-true Badger 5 combined with the added assurance of the Septic Guard liquid formula, which is critical for homes on septic systems. It’s a great choice if you’re looking for a dependable grinder with an integrated septic treatment solution at a more budget-friendly price point.
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Key Features:
- Reliable 1/2 HP Dura-Drive Induction Motor.
- Bundle includes INSINKERATOR BOOST System with Septic Guard for added septic assurance.
- Septic Guard liquid formula supports digestion of solids and reduces odors.
- Compact, space-saving design for easy installation.
- Long-lasting galvanized steel components.
- DIY install and refill change for the BOOST System.
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Pros:
- Cost-effective solution with septic-safe features.
- Reliable performance for everyday food scraps.
- Septic Guard system actively breaks down waste and reduces odors.
- Easy installation and maintenance of the BOOST system.
- Comes with a pre-installed power cord.
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Cons:
- 1/2 HP motor is less powerful than other options, best for lighter use.
- Can be louder than more premium models.
- Septic Guard solution requires refills.
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User Impressions: Many users appreciate the Badger 5’s dependability for its price. The inclusion of the Septic Guard BOOST system makes it a compelling package for those with septic tanks who want a reliable, budget-conscious option that still offers septic protection.
See it on Amazon here
Moen Prep Series PRO Continuous Feed Compact Garbage Disposal, 1/2 HP
Moen’s Prep Series PRO Continuous Feed Disposal is a solid contender for the best garbage disposal for septic 2021, especially for its straightforward septic-safe design. Featuring a powerful 2,600 RPM Vortex motor, it quickly and efficiently grinds everyday food scraps into fine particles, minimizing the risk of clogs and making it suitable for properly-sized septic tanks. Its compact and lightweight design also makes installation or replacement a breeze, even for non-Moen brands.
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Key Features:
- Powerful 2,600 RPM Vortex motor for fast grinding.
- Compact and lightweight 1/2 HP design for easy installation and space-saving.
- Effortlessly replaces most existing garbage disposals, including non-Moen brands.
- Pre-installed power cord for simple plug-and-play setup.
- Septic safe for use with properly-sized septic tanks.
- 5-year limited warranty with in-home service.
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Pros:
- Efficient grinding minimizes septic system impact.
- Very easy to install, even for beginners.
- Compact size saves valuable under-sink space.
- Manufacturer explicitly states “septic safe.”
- Good warranty with in-home service.
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Cons:
- 1/2 HP motor is best for moderate use, not heavy-duty grinding.
- Lacks the advanced enzyme injection system of some InSinkErator models.
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User Impressions: Customers love this Moen disposal for its easy installation, quiet operation, and reliable performance for daily use. The explicit “septic safe” assurance from a trusted brand gives many users peace of mind.
See it on Amazon here
INSINKERATOR Septic Guard Replacement Solution for BOOST Injection System
While not a garbage disposal itself, the InSinkErator Septic Guard Replacement Solution is an absolutely vital “product” for anyone using an InSinkErator disposal with the BOOST Injection System, like the InSinkErator Evolution Septic Guard or the Badger 5 with BOOST. This 16.9-fl oz bottle contains the non-corrosive, scientifically proven liquid formula that’s essential for breaking down food waste and reducing odors in your septic system. It’s the secret sauce that makes those disposals genuinely septic-friendly!
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Key Features:
- One 16.9-fl oz bottle of Septic Guard Replacement Solution.
- Scientifically proven liquid formula to support digestion of solids in septic systems.
- Non-corrosive to plumbing.
- Helps break down food waste buildup and reduces undesired kitchen sink odors with a fresh citrus scent.
- Click-into-place design for easy DIY refill changes.
- “Subscribe and Save” program available for convenient reminders and savings.
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Pros:
- Crucial for the optimal performance of Septic Guard-enabled disposals.
- Actively helps maintain a healthy septic system.
- Reduces odors effectively.
- Easy to install/replace.
- Helps extend the life of your plumbing and septic tank.
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Cons:
- An ongoing expense for compatible disposal users.
- Only useful if you own a compatible InSinkErator BOOST system.
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User Impressions: Users with compatible disposals consider this a necessary and highly effective product. They appreciate the noticeable reduction in odors and the confidence that their septic system is being protected. The ease of refilling is also a frequently mentioned positive.
See it on Amazon here
Frequently Asked Questions About Septic-Safe Garbage Disposals
Q1: Can you use a garbage disposal if you have a septic tank?
A: Yes, you can! While older advice often discouraged it, modern garbage disposals are designed with septic systems in mind. Look for models labeled “septic safe” or those with advanced grinding and enzymatic treatment features, like the Septic Guard system, which help break down food waste into much finer particles that are easier for your septic tank to process.
Q2: What features make a garbage disposal “septic safe”?
A: Several features contribute to a disposal being septic safe:
* High Horsepower (HP) Motor: More powerful motors (3/4 HP, 1 HP) grind food waste into finer particles.
* Multi-Stage Grinding: Systems that grind food in multiple stages ensure super-fine waste, reducing the burden on your septic tank.
* Enzyme or Biodegradable Treatments: Some disposals (like InSinkErator’s Septic Guard) inject a liquid formula with enzymes that help break down food solids and maintain the natural balance of your septic tank.
* Durable Components: Galvanized or stainless steel components resist corrosion, contributing to the disposal’s longevity and preventing premature issues.
Q3: What HP is best for a septic system?
A: For homes with septic systems, a 3/4 HP or 1 HP garbage disposal is generally recommended. These higher horsepower units grind food waste more finely and efficiently than 1/2 HP models, making the waste easier for your septic tank to break down. A 1/2 HP can work for very light use, especially if paired with a septic treatment system, but stronger is usually better for septic health.
Q4: What types of food should I avoid putting down a garbage disposal with a septic system?
A: Even with a septic-safe disposal, it’s best to avoid certain items:
* Fibrous foods: Celery, corn husks, artichokes, onion skins (can tangle blades).
* Grease and fats: Never pour grease down the drain as it solidifies and clogs pipes and septic systems.
* Coffee grounds: Can accumulate and create sludge.
* Pasta and rice: Expand with water and can cause clogs.
* Large bones: Too hard for most disposals.
* Fruit pits: Indestructible for disposals.
Q5: How often should I use septic treatment solutions with my garbage disposal?
A: If your disposal has an integrated Septic Guard system (like some InSinkErator models), it typically dispenses the solution automatically with each use. The Septic Guard solution bottles are designed to last a certain period (often a few months, depending on usage) and require periodic replacement. For non-Septic Guard disposals, you might consider adding septic-safe enzyme treatments to your drains periodically, but always follow the product’s instructions.
Q6: Will a garbage disposal increase my septic tank pump-out frequency?
A: A well-chosen, septic-safe garbage disposal used responsibly might slightly increase the need for septic tank pump-outs, but usually not drastically. The key is “responsibly.” If you minimize the amount of waste, avoid problematic foods, and use a disposal that grinds finely or incorporates enzyme treatments, the impact will be minimal. Regular septic tank maintenance (e.g., pumping every 3-5 years) is crucial regardless of disposal use.
Q7: Are all InSinkErator disposals safe for septic systems?
A: While many InSinkErator models are high-quality and offer good grinding power, not all are specifically designed or marketed with integrated septic solutions. Models like the Evolution Septic Guard or those compatible with the InSinkErator BOOST System with Septic Guard are explicitly engineered with features to support septic systems. For other models, their grinding power can certainly help, but adding a separate septic enzyme treatment might be beneficial.
Final Thoughts
Choosing the best garbage disposal for septic 2021 means investing in a kitchen appliance that offers both convenience and peace of mind. The products reviewed above, particularly those with specialized septic-friendly features like InSinkErator’s Septic Guard technology or powerful multi-stage grinding, are excellent choices for homeowners on septic systems.
Remember, a little research goes a long way in protecting your plumbing and avoiding costly repairs. By selecting a high-quality, septic-safe disposal and using it wisely, you can enjoy a cleaner kitchen without stressing your septic tank. Ready to upgrade your kitchen cleanup? Check out our top recommendations today!