Top 5 Under Sink Sump Pump: Tested & Reviewed

Under sink sump pumps are vital to your drainage system, especially when dealing with sinks, dishwashers, or utility areas below ground level, where traditional drainage systems do not work effectively. 

With the market being flooded with similar models, choosing the right one can be challenging. However, fear not, as I have reviewed the top under sink sump pumps to help you make an informed decision. 

In this post, I will review the 5 best under sink sump pumps that will enhance your drainage capacity and allow you to pump water from your basin into the city sewer lines. So, let’s dive in.

Comparison Of Best Under Sink Sump Pump





Zoeller 105 Under Sink Sump Pump

⅓ HP motor, High quality pump, Non-clogging vortex impeller, Cast iron material


4.6 / 5  

Simer 2925B Under Sink Sump Pump

Corded electric power source, 10901.99 liters per hour (maximum flow rate), Compact contained sump pump


4.5 / 5  

Barnes 112551 Under Sink Sump Pump

50 gallons per minute (maximum flow rate), Stainless steel material, Corded electric power source


4.5 / 5  

Red Lion RL-SPS33 Under Sink Sump Pump

53.33 gallons per minute (maximum flow rate), Corded electric power source, Automatic sump pump


4.4 / 5  

Superior Pump 92072 Under Sink Sump Pump

1/3 HP submersible pump, Thermoplastic material, Vertical float switch


4.5 / 5 

Top 5 Under Sink Sump Pumps Of 2023

Under sink sump pumps are an automatic system that deals with sink and basin waste in situations where gravity falling to the sewer isn’t achievable. 

These pumps comprise a small tank that can fit under the sink or basin and a submersible non-clogging vortex pump with a vertical float. 

When the wastewater fills the tank, the float switch rises, activating the pump to discharge the water, which causes the water level in the tank to decrease, turning the pump off. 

Now that you know how they work, check out the top 5 under sink sump pumps. 


Zoeller 105 Under-Sink Sump Pump

The Zoeller 105 Sump Pump is my top pick for the best under sink sump pumps. The Zoeller 105 is a 1/3 HP, ideal for basement sinks used occasionally. The pump fits typical 1-1/2′′ NPT discharge pipes and can drain the water from your sink. 

This type is one of my top options for basement sinks since it can elevate water 10′ feet out of the basement, requires no tools to install, and is resistant to weather, rust, and wear.

Zoeller is a leader in producing under sink sump pumps with a wide range of models. Zoeller under sink sump pumps are built to last and have a comprehensive warranty. Whether you need a basic model or an advanced one with some extra features, Zoeller has the pump.


  • Automatic, float-operated mechanical switch 115V/1 Ph
  • 9 ft. UL listed 3-wire cord and plug
  • Non-clogging vortex impeller
  • Cast iron material
  • Ac/dc power source


  • High-quality Zoeller pump
  • Body made of cast iron
  • Automatic mechanical switch with float operation
  • Integrated pump system
  • Vortex impeller for solids that do not clog
  • More expensive than other brands

Reviews from customers

Overall, users seem to enjoy the durability, compact size, and easy installation of this Zoeller pump.


Simer 2925B Under-Sink Sump Pump

The Simer 2925B is a well-known laundry system and under-sink sump pump that includes a 1/4 HP pump, a 6-gallon basin, and a 1.5′′ discharge pipe.

Whether installing a new sink in your laundry room or basement or finally building your dream bar, you will need a sump pump to handle the wastewater, such as the Simer 2925B-02 pump.

When you place the new sink below the sewage line, this sump pump handles gray water and pumps it to the sewage line.

It easily fits under your sink and flushes water away with a 1.5-inch discharge pipe.

Its 0.25-horsepower, 115-volt pump motor can handle up to 2,880 gallons per hour and has a flow rate of 1,620 gallons per hour at 10 feet of lift.

Simer 2925B is a good choice for sinks that are rarely used and require water to drain from a lower level. The 1/4 HP motor can drain small quantities of water and particles up to 1/8′′ in size. The built-in check valve prevents sewage or debris from backing into your sink drain.


  • Corded electric power source
  • 10901.99 liters per hour (maximum flow rate)
  • Compact-contained sump pump
  • Easy under-sink installation
  • 1-1/2″ Discharge pipe size

  • Ideal for small places
  • Suitable for handling tiny solids without being clogged
  • Strong 1/4 HP motor
  • It uses significantly less electricity
  • Drain small quantities of water and particles up to 1/8′′ in size
  • Insufficient power for basement use

Reviews from customers

Many users praised the performance of the Simer under sink pump. However, a few users complained about this sump pump being noisy.


Barnes 112551 Under Sink Sump Pump

Barnes 112551 under sink sump pumps are an excellent choice for heavy use in residential and commercial sinks. This system includes a pump, a water storage tank, a discharge line, and a check valve – and has a flow rate of 42 gallons per minute with a 1/3 HP motor.

Barnes sump pumps feature low-cost, high-performance benefits from a rugged, heavy-duty dual-ball bearing design with thermoplastic impellers. 

These under sink sump pumps are all ruggedly built for long operational life and dependability. The package is complete with a stainless steel shaft and heavy-duty seal. They save time and money by being interchangeable with competing sump pump brands.


  • Discharge up to 3,000 gallons an hour
  • 50 gallons per minute (maximum flow rate)
  • Stainless steel material
  • Corded electric power source
  • Split capacitor motor
  • Robust design

  • Has a high output for 1 1/2′′ discharge lines
  • Built-in basin with check valve
  • Non-clogging vortex impeller for solids
  • Works with head heights of up to 30 feet
  • The basin may not be large enough to hold high-flow sinks

Reviews from customers

Users praised the Barnes pump for its durability, quietness, performance, and building material. Many even compared it with Zoeller 105, stating that it performs better.


Red Lion RL-SPS33 Under Sink Sump Pump

The Red Lion RL-SPS33 with 1/3 HP, 115-Volt, 3200 GPH Under-Sink Sump Pump is an excellent choice if you need a dependable and powerful pump.

The RL-SPS33 pump can remove up to 3200 gallons of water per hour, making it ideal for basement or crawlspace applications. The pump is designed and built of long-lasting thermoplastic materials and comes with a 6-gallon polypropylene basin.

This sump pump system is simple to install and is ideal for anyone looking for an efficient and cost-effective way to remove water from their home.

This vertically switched under sink sump pump is ideal for under bars and laundry tubs.


  • Aluminum, structural foam, thermoplastic material
  • 53.33 gallons per minute (maximum flow rate)
  • Corded electric power source
  • Automatic sump pump
  • 1/3 HP pump
  • Durable

  • Strong 1/3 HP Motor
  • Engineered thermoplastic construction
  • 6-gallon polypropylene basin
  • Pre-assembled water removal system
  • Pumps up to 3200 Gallons Per Hour
  • Very expensive

Reviews from customers

Red Lion pumps are popular among users for their affordability and durability. Users loved that this pump is easy to install and quiet in operation. However, some users complained about leaking issues with this pump.


Superior Pump 92072 Under Sink Sump Pump

The Superior Pump 92072 Remote Sink Sump Pump System is pre-assembled and ready to use. The complete kit includes a sump pump, a check valve, a basin, and a basin cover. This equipment is ideal for washing machines, laundry tubs, wet bars, and dehumidifiers.

The pump has a vertical float switch, a 1/3 HP motor, and a thermoplastic or cast iron body capable of handling solids up to 3/8″. It also has a check valve built in to prevent backflow and can pump up to 48 gallons of water per minute (GPM), depending on the head height. 

These under sink sump pumps are corrosion-resistant thermoplastic and include an adjustable vertical float switch with a piggyback plug to turn the pump on and off. The pump has a powerful yet energy-efficient (4.1 Amp) thermally protected motor for added durability and longevity.


  • Handle temperatures up to 120 degrees F
  • 1/3 HP submersible pump
  • Thermoplastic material
  • Vertical float switch
  • AC power source

  • Robust ⅓ HP Motor
  • Prevent backflow of water
  • Drains up to 48 gallons of water per minute
  • Drains 3/8″ solids
  • Corrosion-resistant body designs
  • Not powerful enough for basement use

Reviews from customers

Superior Pump is known for its quality. Users praised this under sink sump pump for its powerful performance and ease of installation. However, there were some complaints about noise and installation instructions for this Pump.

How Should You Choose The Best Under Sink Sump Pump?

Consider these points when hunting for an under-sink sump pump to go under your kitchen or basement sink.

First and foremost, you’ll want to pay attention to the horsepower. A bigger pump will be necessary if you’re dealing with a massive volume of water, especially in a basement setting. 

Another essential factor to consider is the drain line’s size, as most pumps are designed to fit drain lines ranging from 1/8″ to 1/2″. 

Finally, cost is an important consideration. Pumps with more horsepower and features will naturally be more expensive, so it’s essential to think about how you’ll use the pump to get the best value for your money.

Alternatives To Under Sink Sump Pump

Under sink sump pumps have a few alternatives. The first option is a standard gravity drain system, which uses gravity to transport water from one point to another. The disadvantage of a gravity drain system is that it is pretty slow, and unwanted particles often remain stuck in the drain lines. Gravity also fails when the house lacks power. 

Another option is to utilize a portable sump pump that can be brought to any location in the home where you need to drain water. 

The disadvantage of these units is that they are battery-powered and can only work for limited periods before needing to be recharged or replaced. 

So the best option is an under sink sump pump as they are cordless, easy to install anywhere underneath your sink, and can pump out water quickly.

Benefits Of Under Sink Sump Pump

Under sink sump pumps can provide several benefits in residential and commercial settings, including:

  • Preventing water damage: Under sink sump pumps are designed to pump out water accumulating in the sink or the area under the sink. This can help avoid water damage to cabinets, floors, and other building areas.
  • Reducing the risk of mold and mildew: Moisture buildup can lead to mold and mildew growth, which can harm human health. By removing excess water, under sink sump pumps can help reduce the risk of mold and mildew growth.
  • Improving indoor air quality: Mold and mildew can release spores, contributing to poor indoor air quality. Under sink sump pumps can help improve indoor air quality by stopping mold and mildew growth.
  • Saving time and money: Cleaning up water damage can be time-consuming and expensive. By preventing water damage in the first place, under sink sump pumps can help save time and money on repairs.
  • Flexibility of installation: Under sink sump pumps easily fit in tight spaces under sinks, making them a flexible option for various plumbing setups.

Furthermore, an under-sink sump pump can also prevent sewer gasses from entering your home. All the pumps mentioned in this list offer the same benefits.

Buying Guide For Best Under-Sink Sump PumpSource

There is no one-size-fits-all solution for under sink sump pumps. The best under sink sump pumps for your home are related to many factors, such as the height of your cabinets, the type of sink you have, and the amount of water you need to move.

Here are a few things to consider when shopping for under sink sump pumps:

Sink type

Your sink type will determine the size and style of the under sink sump pumps you require. A small submersible pump should be adequate for a standard kitchen or bathroom sink. However, if you have an industrial sink or a laundry tub, a large pedestal or floor-mounted pump may be required.

Cabinet height

The height of your cabinets will also influence the best under sink sump pumps for your home. If your cabinets are tall and deep, a floor-mounted pump may be required to reach the basin’s bottom. A smaller submersible pump may be more appropriate if your cabinets are shorter and shallower.

Water movement

Finally, consider how much water you need to move when choosing under sink sump pumps. If you want to move large amounts of water regularly (such as from an industrial washing machine), consider investing in a larger sump pump with more capacity. 

A small utility pump may require light-duty applications such as moving water from a bathroom sink to a toilet.

FAQs On Under Sink Sump Pump:

What is an under-sink sump pump?

An under-sink sump pump is a small pump that fits underneath a sink or in the area below the sink. It removes excess water that accumulates in the sink or under the sink.

How does an under-sink sump pump work?

Under sink sump pumps typically operate on electricity and use a motor to power a small impeller that pumps water out of the sink or the area under the sink. Some models may also have a float switch that automatically turns the pump on and off as the water level rises and falls.

Can I install an under-sink sump pump myself?

An under-sink sump pump installation can vary depending on the model and the specific plumbing setup. Some under sink sump pumps may be easier to install than others, but consulting with a professional plumber for proper installation is generally recommended.

Can you run a sink drain into a sump pump?

Yes, sink drain lines can lead straight to a sump pump. To work correctly, the plumbing between the sink and the sump pump must be at least two feet above any other drainage source. This is because there must be a section for the liquid to sit in while pumping.

Why does the sink gurgle when my sump pump runs?

When the sump pump is functioning, the sink usually doesn’t gurgle. The noises are coming from your drainage system. If you are experiencing disturbances, it could be from the main city line to which you are connected. The main line has a street connector that permits air in the lines to escape. Reaching a licensed plumber is the best solution for this scenario.

Conclusion: Under Sink Sump Pump

Under sink sump pumps help pump the drain water for various sinks, including laundry tray sinks, bar sinks, multi-compartment sinks, utility sinks, and even washing machines. 

These pumps allow you to install fixtures anywhere, even where gravity drain lines are not accessible. They offer various benefits, such as improving air quality, preventing water damage,  and easy installation. 

Many under sink sump pumps are available in the market, but my top choice is Zoeller 105 for its fantastic features. Depending on your budget and needs, you can also opt for other brands mentioned in this list. 

While buying under sink sump pumps, consider horsepower, cabinet type, sink height, etc., to make an informed decision.

Michael Bowen

Michael Bowen

Michael Bowen is an ambitious entrepreneur who has been in the business of building homes since he was 19. Michael's commitment to honesty, integrity, and high-quality workmanship has earned him a reputation as one of the best in the business.

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