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When the basement floor starts to shine with standing water, best water pump with automatic switch is the tool that starts itself: a pump that senses the water, runs until the floor is clear, and stops on its own. The five pumps here cover float switches and water sensors, flows from 2,000 GPH to 4,600 GPH, and lifts up to 31 feet. The choice comes down to how the switch senses water and how much water the pump must move.
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Quick picks
Best Overall WAYNE CDU790 Sump Pump: 4,600 GPH with a float switch and a 3 year warranty Check price on Amazon
Highest Lift Green Expert 3/4 HP Sump Pump: 4,000 GPH max flow with a 31 foot lift Check price on Amazon
Best Auto Sensor Acquaer 1/3 HP Sump Pump: Auto on at 1-1/2 inches, off below 1/4 inch Check price on Amazon
Best Last-Inch Drain Green Expert 1/3 HP Sensor Pump: Drains to 1/25 inch with a water sensor Check price on Amazon
The kits we chose
| # | Product | Solar Score | Buy |
|---|---|---|---|
| 1 | WAYNE CDU790 Sump Pump | 9.7/10 | Buy on Amazon |
| 2 | Green Expert 3/4 HP Sump Pump | 9.7/10 | Buy on Amazon |
| 3 | Acquaer 1/3 HP Sump Pump | 9.6/10 | Buy on Amazon |
| 4 | Green Expert 1/3 HP Sensor Pump | 9.6/10 | Buy on Amazon |
| 5 | Cleartide 1/3 HP Utility Pump | 9.6/10 | Buy on Amazon |

WAYNE CDU790 Sump Pump
A 1/3 HP submersible sump pump with a float switch, stated to move up to 4,600 GPH for basement water removal.
Pros
- 4,600 GPH stated, the highest flow in this group
- Epoxy-coated steel motor housing with a cast-iron volute stated
- Top suction design stated to eliminate air lock and minimize clogging
- 3 year limited warranty stated
Cons
- 16.4 pounds stated, the heaviest pump in this group
- Indoor use only stated
- No lift height is stated
- Built for a sump pit, not for pool or pond draining
Detailed Review
The listing states a 1/3 HP submersible sump pump with a float switch and a flow of up to 4,600 GPH, for basement water removal during rain and heavy flow. The motor housing is epoxy-coated steel with stainless steel fasteners and a cast-iron volute, and the top suction design is stated to eliminate air lock and minimize clogging from debris. The pump installs in about 15 minutes with no need to drill a weep hole, is assembled in the USA, and carries a 3 year limited warranty. Indoor use only is stated.
Who it's for: owners who want the highest flow in this group for a basement sump pit. Who should skip it: owners who need an outdoor pump or a stated lift height.
Its Solar Score of 9.7/10 comes from performance 32/35, build 22/25, value 21/25, safety 5/10 and warranty 3/5: 83 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Flow | 4,600 GPH |
|---|---|
| Power | 1/3 HP |
| Weight | 16.4 lb |
| Size | 10.5 x 9.0 x 11.0 in |
Taken from the seller's listing on 15 November 2026. Capacity and output figures are rated by the manufacturer.
Safety and Warranty
What this listing states. Integrated float switch stated for automatic operation, with a top suction design, so safety scores 5 of 10. 3 year limited warranty stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 3 of 5. See How We Pick.
Fans and pumps. Keep fingers and cords away from moving blades and intakes, run pumps only submerged as the maker directs, and treat airflow and flow rates as the maker's figures.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.

Green Expert 3/4 HP Sump Pump
A 3/4 HP submersible sump pump with a float switch, stated to move 4,000 GPH max and lift water up to 31 feet.
Pros
- 4,000 GPH max flow stated, 3,000 GPH at a 10-foot lift
- Lifts water up to 31 feet stated
- Float switch with manual and automatic modes stated
- 25-foot power cord stated, with a portable handle
Cons
- 12.0 pounds stated, heavier than the 1/3 HP picks
- 1 year warranty, shorter than the 3 year terms on the WAYNE and the Acquaer
- Manual mode needs the floater locked in the up position
- 14.8 inch tall, the tallest pump in this group
Detailed Review
The listing states a 3/4 HP submersible sump pump with a PSC motor, a max flow of 4,000 GPH at zero feet and 3,000 GPH at a 10-foot lift, lifting water up to 31 feet. The float switch locks in the up position for manual mode or runs in automatic mode, and the pump has a 25-foot power cord, a portable handle and an adapter kit for 1, 1-1/4 and 1-1/2 inch discharge hoses. The oil-free motor has thermal overload protection and a 3-prong grounded cord. The pump weighs 12.0 pounds and carries a 1-year warranty.
Who it's for: owners who want the highest lift in this group for a deep sump or a high discharge. Who should skip it: owners who want a 3 year warranty or a lighter pump.
Its Solar Score of 9.7/10 comes from performance 33/35, build 21/25, value 21/25, safety 5/10 and warranty 2/5: 82 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Flow | 4,000 GPH max |
|---|---|
| Lift | 31 ft |
| Power | 3/4 HP |
| Cord | 25 ft |
Taken from the seller's listing on 15 November 2026. Capacity and output figures are rated by the manufacturer.
Safety and Warranty
What this listing states. Thermal overload protection stated, so safety scores 5 of 10. 1-year warranty stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 2 of 5. See How We Pick.
Fans and pumps. Keep fingers and cords away from moving blades and intakes, run pumps only submerged as the maker directs, and treat airflow and flow rates as the maker's figures.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.

Acquaer 1/3 HP Sump Pump
A 1/3 HP automatic submersible pump with a smart electronic sensor, stated to move up to 2,160 GPH at 115V.
Pros
- 2,160 GPH stated with auto on at 1-1/2 inches of water
- Removes water down to 1/4 inch stated, with a bottom suction design
- Built-in temperature control core stated to prevent dry burning
- 3-year warranty stated
Cons
- No lift height is stated
- 10 ft cord is shorter than the 25 ft cord on the Green Expert 3/4 HP pick
- 1/3 HP motor with lower flow than the 4,600 GPH WAYNE pick
- 3/4 inch garden hose adapter suits a garden hose, not a larger discharge hose
Detailed Review
The listing states a 1/3 HP automatic submersible pump with a smart electronic sensor, moving up to 2,160 gallons per hour at 115V. The sensor turns the pump on when 1-1/2 inches of water is detected and off when the level falls below 1/4 inch, and the bottom suction design removes water down to 1/4 inch. A built-in temperature control core is stated to prevent dry burning, and the strainer base filters debris and is easy to clean without tools or screws. The pump has a 10 ft cord, a 1 inch NPT discharge and a 3/4 inch garden hose adapter with check valve, and a 3-year warranty is stated.
Who it's for: owners who want automatic on and off at low water levels for a pool, hot tub or flooded basement. Who should skip it: owners who need a stated lift height or a longer cord.
Its Solar Score of 9.6/10 comes from performance 29/35, build 21/25, value 20/25, safety 5/10 and warranty 3/5: 78 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Flow | 2,160 GPH |
|---|---|
| Power | 1/3 HP |
| Voltage | 115V |
| Cord | 10 ft |
Taken from the seller's listing on 15 November 2026. Capacity and output figures are rated by the manufacturer.
Safety and Warranty
What this listing states. Built-in temperature control core stated, to prevent dry burning, so safety scores 5 of 10. 3-year warranty stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 3 of 5. See How We Pick.
Fans and pumps. Keep fingers and cords away from moving blades and intakes, run pumps only submerged as the maker directs, and treat airflow and flow rates as the maker's figures.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.

Green Expert 1/3 HP Sensor Pump
A 1/3 HP submersible pump with a water sensor, stated to move 2,000 GPH and drain water to 1/25 inch.
Pros
- 2,000 GPH stated, 22.5 GPM at a 10-foot lift
- Water sensor drains to 1/25 inch stated, with a non-return valve
- Auto stops after 15 seconds when no water is detected stated
- 8.8 lb stated, with hose adapters, lifting rope and non-return valve
Cons
- No lift height is stated
- 2,000 GPH is the lowest flow in this group
- Sensor needs rigid, flat surfaces for best performance stated
- Low-conductivity water needs manual mode and monitoring stated
Detailed Review
The listing states a 1/3 HP submersible pump with a water sensor, moving up to 2,000 gallons per hour at zero feet and 22.5 gallons per minute at a 10-foot discharge lift. The sensor drains water to 1/25 inch with a non-return valve to prevent backflow, and the pump stops automatically after 15 seconds when no water is detected. The oil-free motor has thermal overload protection, and the pump weighs 8.8 pounds with hose adapters, a lifting rope and a non-return valve included, and it carries a 1-year warranty.
Who it's for: owners who want last-inch drainage from flat floors in a flooded basement or garage. Who should skip it: owners who want the highest flow or a 3 year warranty.
Its Solar Score of 9.6/10 comes from performance 29/35, build 20/25, value 21/25, safety 5/10 and warranty 2/5: 77 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Flow | 2,000 GPH |
|---|---|
| Power | 1/3 HP |
| Weight | 8.8 lb |
| Drain | To 1/25 inch |
Taken from the seller's listing on 15 November 2026. Capacity and output figures are rated by the manufacturer.
Safety and Warranty
What this listing states. Thermal overload protection stated, so safety scores 5 of 10. 1-year warranty stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 2 of 5. See How We Pick.
Fans and pumps. Keep fingers and cords away from moving blades and intakes, run pumps only submerged as the maker directs, and treat airflow and flow rates as the maker's figures.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.

Cleartide 1/3 HP Utility Pump
A 1/3 HP submersible utility pump with auto and manual modes, stated to move 2,790 GPH and lift water up to 30 feet.
Pros
- 2,790 GPH stated with a lift of up to 30 feet
- Auto mode starts at 1-1/5 inches and stops at 1/5 inch stated
- 100% copper-wound motor with a thermoplastic housing stated
- 10 ft power cord with a 1-1/4 inch NPT elbow and dual adapters stated
Cons
- No warranty term is stated
- Handles solids only up to 1/8 inch stated
- Sensor start level of 1-1/5 inches leaves more water than the 1/25 inch sensor pick
- Thermoplastic housing, not steel or cast iron
Detailed Review
The listing states a 1/3 HP submersible utility pump with a smart auto mode and a manual mode, moving up to 2,790 GPH and lifting water up to 30 feet. In auto mode the sensor starts at 1-1/5 inches and stops at 1/5 inch, and the pump handles solids up to 1/8 inch. The motor is 100% copper-wound with a thermoplastic housing, and protection against dry-run, overheating and overload is stated, with shutoff if the pump runs dry or tips. The pump comes with a 10 ft power cord, a 1-1/4 inch NPT elbow and dual adapters. No warranty term is stated.
Who it's for: owners who want a portable pump with auto and manual modes for a flooded basement, pool or pond. Who should skip it: owners who want a stated warranty term or a float switch.
Its Solar Score of 9.6/10 comes from performance 30/35, build 21/25, value 21/25, safety 7/10 and warranty 0/5: 79 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Flow | 2,790 GPH |
|---|---|
| Lift | 30 ft |
| Power | 1/3 HP |
| Cord | 10 ft |
Taken from the seller's listing on 15 November 2026. Capacity and output figures are rated by the manufacturer.
Safety and Warranty
What this listing states. Triple protection against dry-run, overheating and overload stated, with shutoff if running dry or tipped, so safety scores 7 of 10. No warranty term, so warranty scores zero. See How We Pick.
Fans and pumps. Keep fingers and cords away from moving blades and intakes, run pumps only submerged as the maker directs, and treat airflow and flow rates as the maker's figures.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
As an Amazon Associate I earn from qualifying purchases.
More picks to compare
Cleartide 1/3 HP Utility Pump, 2790 GPH1/3 HP utility pump, 2790 GPH, with auto water sensor for flooded basements.Check on Amazon
CrestWave Fresh Water Pump, 7 GPMFresh water pump, 7 GPM, 70 PSI, with pressure switch and strainer for RVs.Check on Amazon
MARSTEK Automatic Pump ControllerAutomatic water pump controller and pressure switch, 110V-120V, for self-priming pumps.Check on Amazon
LANCHEZ 1.6 HP Sump Pump, 6000 GPH1.6 HP sump pump, 6000 GPH, with float switch, stainless steel.Check on Amazon
MSELTOS Mini Condensate Pump, 55 GPHMini condensate pump, 55 GPH, 5 ft lift, with float switch for dehumidifiers.Check on Amazon
Numbers side by side
| Pump | Solar Score | Flow | Lift | Switch | Warranty | Amazon |
|---|---|---|---|---|---|---|
| WAYNE CDU790 Sump Pump | 9.7/10 | 4,600 GPH | Not stated | Float switch | 3 years | View on Amazon |
| Green Expert 3/4 HP Sump Pump | 9.7/10 | 4,000 GPH | 31 ft | Float switch | 1 year | View on Amazon |
| Acquaer 1/3 HP Sump Pump | 9.6/10 | 2,160 GPH | Not stated | Water sensor | 3 years | View on Amazon |
| Green Expert 1/3 HP Sensor Pump | 9.6/10 | 2,000 GPH | Not stated | Water sensor | 1 year | View on Amazon |
| Cleartide 1/3 HP Utility Pump | 9.6/10 | 2,790 GPH | 30 ft | Water sensor | Not stated | View on Amazon |
Figures in this table are the manufacturer’s ratings as listed, captured 15 November 2026.
Where the points went
The Solar Score weighs performance, build, value, safety and warranty. For a submersible pump, performance is flow and lift, build is the motor and housing, value is the cord, adapters and modes in the box, and safety means the overload, dry-run and tip protections the listing actually states; a pump that states none scores zero on that line. Four of the five pumps state a warranty term, and the WAYNE and the Acquaer state the longest terms at 3 years. How we pick explains the weights.
| Product | Solar Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| WAYNE CDU790 Sump Pump | 9.7 | 32 | 22 | 21 | 5 | 3 |
| Green Expert 3/4 HP Sump Pump | 9.7 | 33 | 21 | 21 | 5 | 2 |
| Acquaer 1/3 HP Sump Pump | 9.6 | 29 | 21 | 20 | 5 | 3 |
| Green Expert 1/3 HP Sensor Pump | 9.6 | 29 | 20 | 21 | 5 | 2 |
| Cleartide 1/3 HP Utility Pump | 9.6 | 30 | 21 | 21 | 7 | 0 |
The Solar Score runs on a 9.2 minimum and a 9.8 maximum, and the weighted point total is placed on that line in proportion, so more points can only raise it.
How to choose the best water pump with automatic switch
Float switch or water sensor
The switch decides when the pump runs. The WAYNE and the Green Expert 3/4 HP pumps use a float switch, and the Green Expert 3/4 HP float locks in the up position for manual mode. The Cleartide, Acquaer and Green Expert sensor pumps use a water sensor: the Cleartide starts at 1-1/5 inches and stops at 1/5 inch, the Acquaer starts at 1-1/2 inches and stops below 1/4 inch, and the Green Expert sensor drains to 1/25 inch and stops after 15 seconds with no water detected. A float switch suits a sump pit, while a sensor suits a flat floor that must drain to the last inch. See the how to use a submersible water pump guide for setup steps.
Match flow and lift to the job
Flow sets how fast water leaves, and lift sets how high it can go. The WAYNE states 4,600 GPH, the Green Expert 3/4 HP states 4,000 GPH max with 3,000 GPH at a 10-foot lift, the Cleartide states 2,790 GPH, the Acquaer states 2,160 GPH and the Green Expert sensor states 2,000 GPH. Lift is stated for two pumps only: 31 feet for the Green Expert 3/4 HP and 30 feet for the Cleartide. Match the flow to the size of the flood and the lift to the height of the discharge, and check the stated figures before ordering.
| Pump | Flow | Switch |
|---|---|---|
| WAYNE CDU790 Sump Pump | 4,600 GPH | Float switch |
| Acquaer 1/3 HP Sump Pump | 2,160 GPH | Water sensor |
| Green Expert 3/4 HP Sump Pump | 4,000 GPH | Float switch |
| Cleartide 1/3 HP Utility Pump | 2,790 GPH | Water sensor |
| Green Expert 1/3 HP Sensor Pump | 2,000 GPH | Water sensor |
Cord, adapters and weight
The cord sets how far the pump can sit from the outlet. The Green Expert 3/4 HP pump has a 25-foot power cord, while the Cleartide and Acquaer pumps have 10 ft cords. Adapters matter too: the Cleartide comes with a 1-1/4 inch NPT elbow and dual adapters, and the Green Expert 3/4 HP comes with an adapter kit for 1, 1-1/4 and 1-1/2 inch discharge hoses. The Green Expert sensor pump weighs 8.8 pounds and the WAYNE weighs 16.4 pounds, so check the weight against the pit or the carry to the flood.
Read the warranty lines closely
Warranty terms vary more than flow does. The WAYNE and the Acquaer state 3 year terms, and the two Green Expert pumps state 1 year terms. The Cleartide states no warranty term. A longer term matters on a pump that lives in a wet pit, so compare the stated terms before ordering.
Sizing Notes
- Match flow to the flood: 4,600 GPH for the WAYNE, 4,000 GPH for the Green Expert 3/4 HP, 2,790 GPH for the Cleartide, 2,160 GPH for the Acquaer and 2,000 GPH for the Green Expert sensor pump.
- Match lift to the discharge height: 31 feet stated for the Green Expert 3/4 HP and 30 feet for the Cleartide, with no lift stated for the other three pumps.
- Match the switch to the surface: a float switch for a sump pit, a water sensor for a flat floor, with sensor start levels from 1-1/5 inches to 1-1/2 inches.
- Check the cord against the outlet: 25 feet for the Green Expert 3/4 HP and 10 ft for the Cleartide and Acquaer pumps.
FAQ: power away from the grid
How does an automatic water pump switch work?
A float switch rises with the water and starts the pump, while a water sensor detects water on the floor and starts the pump. The WAYNE and the Green Expert 3/4 HP pumps use a float switch, and the Cleartide, Acquaer and Green Expert sensor pumps use a water sensor. The pump stops when the float drops or the sensor finds no water.
Which pump here moves the most water?
The WAYNE, at 4,600 GPH stated. The Green Expert 3/4 HP follows at 4,000 GPH max, with 3,000 GPH at a 10-foot lift. For a deep sump, the Green Expert 3/4 HP also states the highest lift at 31 feet.
Can these pumps drain a flat floor to the last inch?
The Green Expert sensor pump drains to 1/25 inch with a non-return valve, and the Acquaer removes water down to 1/4 inch. The Cleartide starts at 1-1/5 inches in auto mode. For a flat floor, a sensor pump fits better than a float switch pump. See the solar sump pump vs electric sump pump comparison for power options.
Do these pumps need a special outlet?
The Acquaer plugs into any standard 115V wall outlet with its 10 ft three-prong plug power cord. The Green Expert 3/4 HP pump has a 3-prong grounded cord. Check the outlet type in the maker’s manual before ordering.
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