Whether you experience occasional basement flooding or want to prepare for future heavy rains, a sump pump is one of the best ways to protect your home from water damage. When water in the sump pit reaches a certain level, the pump automatically removes it before it can accumulate in your basement or crawl space.
Our guide compares the best sump pumps on Amazon and explains key features to consider. We also include advice from This Old House experts, including plumbing and heating expert Richard Trethewey.
Key Takeaways
- Our top sump pump pick is the Zoeller M53 Mighty-Mate Sump Pump because of its durable cast-iron construction, dependable performance, and reliable automatic operation.
- Most residential sump pumps cost anywhere from $100–$300, while battery backup and combination systems can range from $300–$700 or more before installation.
- When shopping for a sump pump, prioritize horsepower, flow rate, and minimum basin size to ensure the pump delivers enough power and fits your existing sump pit.
Top 5 Sump Pumps
- Zoeller M53 Mighty-Mate Sump Pump: Best Overall
- WAYNE CDU790 Submersible Sump Pump: Best Value
- Liberty Pumps 237 1/3 HP Submersible Sump Pump: Best Heavy-Duty
- Wayne 58321-WYN3 Submersible Sump Pump: Best High-Capacity
- Wayne WSS30VN Battery Back-Up Sump Pump: Best Battery Backup
Compare Top Sump Pumps
The table below highlights our top picks for the best sump pump options.
| Product | Motor | Flow Rate | Minimum Basin Size | Weight | Warranty |
|---|---|---|---|---|---|
Zoeller M53 Mighty-Mate Sump PumpCheck Price | 1/3 HP | 43 GPM | 10 inches | 21 pounds | 3 years |
WAYNE CDU790 Submersible Sump PumpCheck Price | 1/3 HP | 63 GPM | 11 inches | 16.4 pounds | 3 years |
Liberty Pumps 237 1/3 HP Submersible Sump PumpCheck Price | 1/3 HP | 44 GPM | 10 inches | 11 pounds | 2 years |
Wayne 58321-WYN3 Submersible Sump PumpCheck Price | 3/4 HP | 92 GPM | 11 inches | 11 pounds | 3 years |
Wayne WSS30VN Battery Back-Up Sump PumpCheck Price | 1/2 HP | 85 GPM | 16 inches | 37.4 pounds | 3 years |
Our Reviews of the Best Sump Pumps
Read over our reviews of the best sump pumps below based on each unit’s capability, durability, and cost. Each sump pump is easily available on Amazon, so you can get your basement or crawlspace in order quickly.
Best Overall
Zoeller M53 Mighty-Mate Sump Pump
Good for: A dependable sump pump that delivers long-term performance in most basements
The Zoeller M53 is a heavy-duty cast-iron sump pump designed to automatically protect your home’s foundation from flooding during heavy rainfall and storms. Its robust construction features a corrosion-resistant finish and stainless steel hardware, while the 1.5-inch discharge pipe can handle solids up to 0.5 inches in diameter without clogging. The screenless design helps ensure reliable operation, and optional alarm systems can monitor water levels and pump performance.
Pros and Cons of Zoeller M53 Mighty-Mate Sump Pump
- Cast-iron construction withstands years of regular use
- Handles solids up to half-an-inch in size to reduce clogging
- Automatic float switch provides dependable operation
- Comes at a higher price than many 1/3-horsepower (HP) sump pumps
- Nine-foot power cord offers less reach than some competitors
Key Features
- Motor: 1/3 HP
- Flow rate: 43 GPM
- Warranty: 3 years
What People Are Saying About The Zoeller M53 Mighty-Mate Sump Pump
Amazon customers describe the Zoeller M53 Mighty-Mate Sump Pump as a dependable, long-lasting pump that performs well during heavy rain and frequent use. Many homeowners appreciate its durable cast-iron construction, reliable float switch, and straightforward installation. Some customers, however, report premature failures or leaking issues after several years of operation.
Best Value
WAYNE CDU790 Submersible Sump Pump
Good for: Homeowners who want reliable flood protection without paying for premium features
The WAYNE CDU790 combines dependable performance with durable construction at a competitive price, making it our pick for the best value sump pump. Its 1/3-HP motor pumps up to 4,600 gallons per hour (GPH), while the cast-iron base, corrosion-resistant steel housing, and integrated vertical float switch are designed for years of reliable operation. The pump also features a top-suction design that helps reduce clogging and can get installed in about 15 minutes without drilling a weep hole.
Pros and Cons of WAYNE CDU790 Submersible Sump Pump
- Cast-iron base and corrosion-resistant steel housing enhance durability
- Top-suction design helps minimize clogging and air lock
- Straightforward installation without drilling a weep hole
- Fits only sump basins 11 inches or larger
- Lower flow rate than higher-powered 1/2-HP and 3/4-HP models
Key Features
- Motor: 1/3 HP
- Flow rate: 63 GPM
- Warranty: 3 years
What People Are Saying About The WAYNE CDU790 Submersible Sump Pump
Reviewers say the WAYNE CDU790 Submersible Sump Pump offers dependable performance, quiet operation, and excellent value for the price. Amazon customers also mention its sturdy construction and simple installation, with many noting it quickly removes water during heavy storms. Some homeowners report durability concerns, including premature failures or float switch issues over time.
Best Heavy-Duty
Liberty Pumps 237 1/3 HP Submersible Sump Pump
Good for: A durable, low-maintenance sump pump built for years of dependable use
The Liberty Pumps 237 is a 1/3-HP submersible sump pump designed for residential groundwater removal in basements and crawl spaces. Its powder-coated aluminum motor housing, vortex-style impeller, and vertical magnetic float switch help reduce clogs and support reliable automatic operation. With a 44 gallons per minute (GPM) flow rate, a 21-foot lift capacity, and a 10-foot quick-disconnect power cord, it offers dependable performance in standard sump pits.
Pros and Cons of Liberty Pumps 237 1/3 HP Submersible Sump Pump
- Vortex-style impeller helps reduce clogging and improve water flow
- Lightweight aluminum housing resists corrosion
- Vertical magnetic float switch supports reliable automatic operation
- Lower flow rate than some competing 1/3-HP pumps
- Two-year warranty is shorter than several competitors we reviewed
Key Features
- Motor: 1/3 HP
- Flow rate: 44 GPM
- Warranty: 2 years
What People Are Saying About The Liberty Pumps 237 1/3 HP Submersible Sump Pump
Amazon customers appreciate the Liberty Pumps 237 for its quiet operation, fast pumping speed, and solid construction. Many homeowners say it’s easy to install and worth the higher price because of its dependable performance and long service life. However, a few negative reviews report early pump failures or float switch problems.
Best High-Capacity
Wayne 58321-WYN3 Submersible Sump Pump
Good for: Homeowners with frequent flooding or high water volumes who need maximum pumping power
The Wayne 58321-WYN3 is a high-capacity submersible sump pump capable of moving up to 4,600 GPH, making it ideal for homes that face significant water intrusion. Its top-suction design effectively filters out debris and minimizes clogging issues, while the stainless steel and cast-iron construction provide long-term durability. This pump requires a larger sump pit of 11 inches or more in diameter and is specifically designed for indoor basement applications.
Pros and Cons of Wayne 58321-WYN3 Submersible Sump Pump
- Pumps up to 92 GPM for high-volume water removal
- Top-suction design helps reduce clogging
- Available with smart monitoring through the Wayne Connected app
- Requires an 11-inch or larger sump basin
- Costs more than standard residential sump pumps
Key Features
- Motor: 3/4 HP
- Flow rate: 92 GPM
- Warranty: 3 years
What People Are Saying About The Wayne 58321-WYN3 Submersible Sump Pump
Many Amazon reviewers say the Wayne 58321-WYN3 Submersible Sump Pump delivers powerful performance, quickly removing large volumes of water while operating quietly. Customers also like its durable construction and easy installation, and some mention the convenience of monitoring the pump through the Wayne Connected app. However, some homeowners have experienced inconsistent float switch performance or premature pump failures.
Best Battery Backup
Wayne WSS30VN Battery Back-Up Sump Pump
Good for: Homeowners who want their sump pump to keep working during power outages
The Wayne WSS30VN is a 1/2 HP sump pump system that combines high-capacity pumping—of up to 5,100 gallons per hour—with battery backup capability to keep your basement dry even during power outages. You can install the pre-assembled system in approximately 15 minutes and this model fits sump basins 16 inches or larger. However, you will need to purchase a separate battery for the backup feature. Backed by a three year warranty and assembled in the U.S., this pump provides reliable protection against basement flooding from heavy rains or snowmelt.
Pros and Cons of Wayne WSS30VN Battery Back-Up Sump Pump
- Battery backup keeps the pump running during power outages
- Ships preassembled for faster installation
- High flow rate handles heavy flooding
- Backup battery is sold separately
- More expensive than a standard sump pump
Key Features
- Motor: 1/2 HP
- Flow rate: 85 GPM
- Warranty: 3 years
What People Are Saying About The Wayne WSS30VN Battery Back-Up Sump Pump
Owners of the Wayne WSS30VN Battery Backup Sump Pump frequently mention its straightforward installation, reliable backup protection, and quiet operation. Many homeowners say the system provides peace of mind during storms and power outages. On the other hand, some customers were frustrated with customer service or experienced issues with the discharge outlet and other components.
Sump Pump Buying Guide
Before purchasing a sump pump, consider its horsepower, flow rate, switch type, materials, power source, extra features, and price. These factors determine how quickly the pump removes water, how reliable it is during heavy storms, and how long it will last.
Most residential sump pumps run from $100–$300, while battery backup and combination systems typically cost $300–$700 or more. Investing in a more expensive model could result in a more durable motor, higher pumping capacity, and additional features like battery backup or smart monitoring.
Types of Sump Pumps
The first step in choosing a sump pump is deciding which type best suits your home. Each type offers different advantages in terms of pumping power, noise level, installation, and reliability during power outages. Understanding these differences can help you select the right pump for your basement and budget.
Submersible sump pumps sit inside the sump basin with the motor enclosed in a waterproof housing. They operate quietly, take up less space, and generally provide the best combination of power and convenience, making them the most popular option for residential basements.
Pedestal sump pumps position the motor above the sump basin while the pump sits below the water. These models are typically more affordable and easier to service because the motor is easier to access. However, they operate louder and require more floor space than submersible pumps.
Battery backup pumps automatically activate if your primary pump loses power during a storm. They’re especially valuable in areas prone to severe weather or frequent power outages, providing an extra layer of protection when your primary pump can’t operate.
Combination systems include both a primary electric sump pump and a battery backup pump in one package. Although they cost more upfront, they provide continuous protection during power outages and eliminate the need to purchase a separate backup system later.
Horsepower
A sump pump’s horsepower (HP) determines how much water it can move and how well it handles demanding conditions. Most residential sump pumps have motors ranging from 1/3 HP to 1 HP, with larger motors providing greater pumping capacity.
- 1/3 HP: Suitable for most homes with occasional water intrusion or a standard basement.
- 1/2 HP: Better for homes with frequent groundwater, larger basements, or moderate flooding.
- 3/4 HP or higher: Best for high water tables, severe storms, or homes that regularly experience heavy flooding.
Choosing more horsepower than you need typically increases purchase price and energy use without providing meaningful benefits. Most homeowners will find that a 1/3- or 1/2-HP sump pump provides more than enough performance.
Flow Rate
Flow rate measures how much water a sump pump can remove and is listed in gallons per minute (GPM). While horsepower contributes to overall performance, the flow rate provides a clearer picture of how quickly the pump can remove water from your basement.
Most residential sump pumps move between 40 and 60 GPM, while high-capacity models can exceed 90 GPM. If your home only experiences occasional water intrusion, a moderate flow rate is usually sufficient. Homes in flood-prone areas or with high water tables may benefit from a higher-capacity pump that removes water faster during heavy storms.
Basin Size Compatibility
Before purchasing a sump pump, verify that it will fit your existing sump basin. Manufacturers specify a minimum basin diameter to ensure the pump and float switch have enough room to operate correctly. Most standard sump pumps require a 10- or 11-inch basin, while battery backup and combination systems often need a 16-inch or larger basin to accommodate additional components.
Switch Type
The float switch activates the sump pump when water reaches a predetermined level, making it one of the most important components of the system. The best switch type for your home depends largely on the size of your sump basin and your maintenance preferences.
- Vertical float switches fit inside narrow sump basins and are less likely to become obstructed.
- Tethered float switches offer reliable operation but require a larger basin so the float has room to move freely.
- Electronic switches use water sensors instead of mechanical floats, reducing the risk of jams while providing more precise water-level detection.
Materials and Weight
Most residential sump pumps are made from thermoplastic, aluminum, cast iron, or stainless steel components.
Plastic pumps are lightweight and affordable but generally aren’t as durable as metal models. Aluminum resists corrosion while keeping the pump lightweight, making it easier to install and service. Cast iron offers excellent durability and dissipates heat well, making it a popular choice for premium sump pumps. Stainless steel hardware also resists corrosion and helps extend the pump’s lifespan.
Material also affects a pump’s weight. Cast iron pumps are typically heavier than aluminum or plastic models, but the added weight helps keep the pump stable during operation. Lightweight aluminum pumps are easier to install and remove for maintenance, making them a good choice for do-it-yourself (DIY) homeowners.
Power Source
Most sump pumps plug into a standard household outlet and operate whenever electricity is available. However, power outages often occur during the same storms that cause basement flooding.
If your basement is finished or contains valuable belongings, consider purchasing a battery backup or combination system so your home remains protected during electrical outages. As This Old House plumbing experts note, storms that cause basement flooding often result in power outages as well, making a battery backup one of the most valuable upgrades for flood-prone homes. It’s also best to plug your sump pump into a dedicated 15-amp circuit to reduce the chance of accidental power loss.
Warranty
Most residential sump pumps include warranties ranging from one to three years, though coverage varies by manufacturer. A longer warranty can provide additional peace of mind by protecting against defects in materials or workmanship. While we don’t recommend considering warranty length as your only deciding factor when shopping for a sump pump, it’s worth considering if you’re comparing similarly priced models.
Extra Features
Some sump pumps include additional features that can improve convenience, performance, or reliability. Here are a few features worth considering:
- High-water alarm: Sounds an audible alert when water rises above the normal operating level, indicating a potential pump failure or excessive flooding.
- Wi-Fi monitoring: Connects the sump pump to a smartphone app, allowing you to monitor pump activity, receive alerts, and check system status remotely.
- Thermal overload protection: Automatically shuts off the motor if it overheats, helping prevent permanent motor damage.
- Top-suction design: Draws water from the top of the pump to reduce clogging from debris settling at the bottom of the sump pit.
- Check valve compatibility: Allows you to install a check valve that prevents discharged water from flowing back into the sump basin, reducing unnecessary pump cycling.
How Do You Install a Sump Pump?
Replacing an existing sump pump is a project many experienced DIYers can complete in about an hour. Most replacement pumps fit standard sump basins and connect to an existing discharge pipe with minimal plumbing modifications.
Installing a brand-new sump pump system is more involved because it requires cutting through the basement floor, installing a sump basin and drainage system, and routing a discharge pipe outside the home. If your home doesn’t already have a sump pit, hiring a licensed plumber is often the best option.
Pro Tip
- This Old House plumbing and heating expert Richard Trethewey recommends installing a check valve on every sump pump. Without one, water in the discharge pipe flows back into the sump pit after the pump shuts off, causing the pump to cycle on and off unnecessarily. If your pump doesn’t include a check valve, plan to purchase one separately.
Sump Pump Maintenance Tips
Routine maintenance helps ensure your sump pump is ready when heavy rain or snowmelt arrives. We put together some tips to help you keep your sump pump in working condition.
Do:
- Test the float switch every few months.
- Clean debris from the sump basin regularly.
- Inspect the discharge pipe for clogs or damage.
- Replace backup batteries according to the manufacturer’s recommendations.
Don’t:
- Plug the pump into an extension cord.
- Allow the discharge pipe to freeze during winter.
- Ignore unusual noises or excessive cycling.
- Wait until a major storm to test your sump pump.
FAQs About Sump Pumps
How often should I test my sump pump?
Test your sump pump at least twice a year, ideally before spring snowmelt and the start of your area’s rainy season. Pour a bucket of water into the sump pit to confirm the float switch activates the pump and that it removes water properly. If you have a battery backup system, test it monthly and replace the battery according to the manufacturer’s recommendations.
What size sump pump do I need?
Most homes only need a 1/3- or 1/2-HP sump pump. The right size depends on your basement, the amount of groundwater your home receives, and how quickly water enters the sump pit during heavy rain. If you’re unsure, a licensed plumber or waterproofing contractor can recommend the appropriate pump.
How long do sump pumps last?
Most submersible sump pumps last 8–12 years, while pedestal models can last 15–20 years because their motors stay above the water. Regular testing, cleaning, and routine maintenance can help maximize your pump’s lifespan
Do I need a battery backup sump pump?
A battery backup sump pump is worth considering if you live in an area that experiences frequent power outages or severe storms. It automatically takes over if your primary pump loses power, helping protect your basement when flooding is most likely. If you have a finished basement or store valuable belongings below ground, a battery backup can help reduce the risk of costly water damage.
Our Methodology
To provide our readers with the best sump pump recommendations possible, we rely on several key sources of information to help guide our selection process.
- Initial research: Our research process began by generating a list of sump pumps with a significant number of verified buyer reviews and an average customer review rating of 4–5 stars on Amazon. We looked at positive and negative reviews alike, focusing on information from both satisfied and critical buyers to understand real-world performance in basements and crawlspaces.
- Expert insights: Through years of experience, we’ve learned that listening to what others have to say is key to building accurate, well-rounded articles. To complement our in-house expertise, our team looked at reviews and videos from trusted publications and independent testers, spoke with plumbing professionals and waterproofing contractors, and drew insights from homeowner experiences shared by our readers.
- Final product selection: We then began fine-tuning our list by replacing older sump pump models with the latest versions and eliminating any discontinued models. From there, we pared the list down by comparing each pump’s horsepower, flow rate, durability features, and warranty coverage, selecting the best-in-class options for a variety of basement sizes, water intrusion levels, and homeowner budgets.
Why You Can Trust Us
This Old House has empowered homeowners and DIYers for more than four decades with top-notch home improvement advice in the form of television programs, print media, and digital content.
Our team focuses on creating in-depth product and service review content. To date, we’ve published over 1,600 reviews on products for the home, from doorbell cameras and dining room decor to circular saws and snow blowers.
Once we conclude the research and testing phases, we craft a comprehensive, user-friendly article of recommended products and additional information to help our readers make the right purchase.
