10 bestOutdoor Sump Pumpof December 2025
112M consumers helped this year.
1
DEKOPRO 3/4HP 4600GPH Sump Pump, Submersible Cast Iron and Stainless Steel Sump Pump with Integrated Vertical Float Switch
DEKOPRO
10.0
2
DEKOPRO 1HP Sump Pump, 5400GPH Submersible Cast Iron and Stainless Steel Sump Pump with Integrated Vertical Float Switch
DEKOPRO
10.0
3
Little Giant 14940655 CS-SS 115 Volt 3000 GPH Sump Pump
Little Giant
9.8
30% off
4
Zoeller 53-0001 1/3 HP 43 GPM 1-1/2-Inch Discharge M53 Mighty-Mate Automatic All Cast Iron Sump Pump with Vertical Float Switch
Zoeller
9.6
5
Wayne CDU800 1/2 HP Submersible Cast Iron and Steel Sump Pump with Integrated Vertical Float Switch
Wayne
9.3
Other
Wayne CDU790 1/3 HP Submersible Cast Iron and Steel Sump Pump with Integrated Vertical Float Switch
Wayne CDU980E 3/4 HP Submersible Cast Iron and Stainless Steel Sump Pump with Integrated Vertical Float Switch
Liberty Pumps 237 1/3-Horse Power 1-1/2-Inch Discharge 230-Series Automatic Submersible Sump Pump with VMF Switch
Liberty Pumps 257 1/3-Horse Power 1-1/2-Inch Discharge 250-Series Cast Iron Automatic Submersible Sump/Effluent Pump with VMF Switch, Gray
6
Red Lion RL-SC50V 115-Volt, 1/2 HP, 4300 GPH Cast Iron Sump Pump with Vertical Switch, 10-Ft. Cord, Red, 14942747
Red Lion
9.1
7
Liberty Pumps 287 1/2-Horse Power 1-1/2-Inch Discharge 280-Series Automatic Submersible Sump Pump with VMF Switch, Gray
Liberty Pumps
8.8
8
Red Lion RL-SC50T 115-Volt, 1/2 HP, 4300 GPH Cast Iron Sump Pump with Tethered Float Switch, 10-Ft. Cord, Red, 14942746
Red Lion
8.6
15% off
9
Zoeller 98-0001 1/2 HP 72 GPM 1-1/2-Inch Discharge M98 Flow-Mate Cast Iron Automatic Sump Pump with Vertical Float Switch
Zoeller
8.3
10
Liberty Pumps 257-2 Vertical Magnetic Float 1/3 HP Cast Iron Submersible Sump/Effluent Pump with 25-Feet Cord
Liberty Pumps
8.0
A Guide to Selecting the Best Outdoor Sump Pump
Choosing the right outdoor sump pump is essential for protecting your property from flooding and water damage. The right pump will efficiently remove water from areas like basements, yards, or crawl spaces, especially during heavy rains or after snow melts. To make a smart choice, you should understand the key features and specifications that affect performance, durability, and suitability for your specific needs. By focusing on these aspects, you can ensure your sump pump will work reliably when you need it most.
Pump Type
There are two main types of sump pumps: submersible and pedestal. Submersible pumps are designed to be placed underwater in the sump pit, making them quieter and more efficient for heavy-duty use. Pedestal pumps have the motor above the pit, making them easier to service and generally longer-lasting, but they can be noisier and less powerful. If you need to handle large volumes of water or want a quieter operation, a submersible pump is usually better. For lighter use or easier maintenance, a pedestal pump may be sufficient.
Horsepower (HP)
Horsepower measures the strength of the pump's motor and determines how much water it can move. Common values range from 1/4 HP to 1 HP. Lower horsepower pumps (1/4 to 1/3 HP) are suitable for areas with minor water issues, while higher horsepower (1/2 HP and above) is better for larger spaces or areas prone to heavy flooding. To choose the right horsepower, consider the size of the area you need to protect and how much water typically accumulates during storms.
Flow Rate (Gallons Per Hour or GPH)
Flow rate tells you how much water the pump can move in an hour, usually measured in gallons per hour (GPH). Lower flow rates (up to 2,000 GPH) are fine for small pits or occasional water, while higher rates (3,000 GPH and above) are needed for larger or frequently flooded areas. Think about how quickly water collects in your space and pick a pump with a flow rate that can keep up during peak conditions.
Head Height (Maximum Lift)
Head height, or maximum lift, is the highest vertical distance the pump can move water. If your discharge point is far above the sump pit, you need a pump with a higher head height. For most homes, a head height of 10-15 feet is enough, but if you need to pump water up a steep slope or to a higher level, look for pumps with greater lift capacity. Match the pump's head height to your specific installation needs.
Switch Type
Sump pumps use different types of switches to turn on and off automatically. The most common are float switches, diaphragm switches, and electronic sensors. Float switches are reliable and easy to understand, while electronic sensors can be more precise but may be sensitive to debris. Choose a switch type that matches your maintenance preferences and the likelihood of debris in your sump pit.
Material and Build Quality
The materials used in the pump affect its durability and resistance to corrosion. Cast iron and stainless steel pumps are more durable and suitable for outdoor or harsh environments, while plastic pumps are lighter and less expensive but may not last as long. If your pump will be exposed to the elements or used frequently, opt for a model with robust construction.
Power Source
Most sump pumps are powered by electricity, but some have battery backup or can run on water pressure. Electric pumps are reliable as long as you have power, but a battery backup is important if you live in an area prone to power outages during storms. Consider your local weather and power reliability when choosing the right power source for your pump.
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