A bilge pump float switch is an essential part of any boat’s bilge pump system. The float switch automatically turns the bilge pump on and off as the water level in the bilge rises and falls. A good bilge pump float switch will keep your bilge pump running smoothly and prevent it from burning out.
There are a lot of different bilge pump float switches on the market, so it can be tough to know which one to choose. That’s why we’ve put together this list of the best bilge pump float switches on the market. We’ve looked at a variety of factors, including price, durability, and features, to come up with this list.
We hope that this list will help you find the perfect bilge pump float switch for your boat.

Comparison Of Top Bilge Pump Float Switch
# | Image | Title | Rating | Price |
---|---|---|---|---|
1 | ![]() | Rule 35A Rule-A-Matic Bilge Pump Float Switch, Mercury Free,White | 4.68 | Buy on Amazon |
2 | ![]() | Rule 40A Rule-A-Matic Plus Bilge Pump Float Switch, 12, 24 or 32 Volt, Moisture Tight Seals , White , Small | 4.68 | Buy on Amazon |
3 | ![]() | Boat Bilge Water Pump 12 V 1100 GPH Electric Marine Bilge Pump and Automatic Boat Bilge Pump Float Switch 12 V 24 V 32 V for Boats, 2 Pieces in Total | 4.88 | Buy on Amazon |
4 | ![]() | Shoreline Marine Float Switch | Automatic Lever Type | No Mercury, Tinned Marine-Grade Wire | Simple Installation | Mounting Hardware Included | Boat Accessory | 4.68 | Buy on Amazon |
5 | ![]() | Ogrmar Automatic Boat Bilge Pump Float Switch Moisture Tight Seals 12/24/32VDC Ignition Protected Mercury | 4.8 | Buy on Amazon |
6 | ![]() | Seachoice Universal Series Automatic Marine Bilge Pump Float Switch For 6-36V | 4.68 | Buy on Amazon |
List of Best Bilge Pump Float Switch 2022
1. Rule 35A Rule-A-Matic Bilge Pump Float Switch,
Rule has been making quality switches for boaters for years, and their Rule-A-Matic switch is no exception. This switch is removable from the base for easy cleaning, and it features completely sealed metal capsules that enhance flawless operation. The mercury free snap switch is tested to over one million cycles, so you can be sure that it will last for years.

Things We Like:
- -Removable switch for easy cleaning
- -Sealed metal capsules for enhanced operation
- -Tested to over one million cycles
- -Marine grade “blocked” wire
2. Rule 40A Rule-A-Matic Plus Bilge Pump Float
This pump is designed for use with high water alarms and can turn the pump on when the water level reaches 2″ (51mm) and turn the pump off when water level falls to 3/4″ (19mm). It is also designed for pumps drawing up to 20 amps.

Things We Like:
- -Rugged and durable
- -Impact resistant cover
- -Highly abrasive resistant marine grade wire
- -Built-in test feature
- -Can be used to operate high water alarm systems
3. Boat Bilge Water Pump 12 V 1100
This package comes with a boat bilge water pump and a float switch. The pump can flow 1100 gallons per hour and has a head of 13 feet. The switch can turn the pump on when the water level reaches 2 inches and turn it off when the water level reaches 0.7 inches.
This pump is great for use in hydraulic systems with cold water. It can also be used in fishing boats, cruisers, runabouts, yachts, and marine, RV, and other places that need to drain water.

Things We Like:
- -The flow of the pump is 1100 gallons per hour
- -The flow rate is 1100 GPH
- -The voltage is 12 V DC
- -The head is 13 ft (4mts)
- -The outlet diameter is 1-1/8 inch/ 29 mm
- -The cable length is 3.3 ft/ 1 m
- -The wire length is 3.3 ft/ 1 m
- -The wire gauge size is 18 AWG
- -The pump is electric
4. Shoreline Marine Float Switch | Automatic Lever
This product is designed to work with DC bilge pumps and is designed to be submerged. The wiring diagram is included in the package.

Things We Like:
- -Activates pump automatically
- -For use with DC bilge pumps
- -Unit is submersible
- -Wiring diagram is included in package
5. Ogrmar Automatic Boat Bilge Pump Float Switch
This electric pump can handle up to 20 amps on 12 volts, 10 amps on 24 volts, and 8 amps on 32 volts. It has a removable switch for easy cleaning, and can be turned on or off using the included pump handle. The heavy duty flow switch is designed for the toughest applications, and is environmentally responsible.

Things We Like:
- -20A max amps for 24V
- -10A max amps for 32V
- -1M wire length
- -18AWG wire gauge
- -Switching frequency up to 10 million times
- -Environmentally responsible
6. Seachoice Universal Series Automatic Marine Bilge Pump
This pump converts your DC bilge pump to automatic operation, ensuring that your boat stays clean and secure. With a capacity of 2,000 gallons per hour, this pump can handle a lot of water. And because it’s made from non-corrosive ABS plastic, it will withstand the elements.

Things We Like:
- -2,000 gallons per hour capacity
- -Non-corrosive ABS plastic construction
- -36 Volts Strength
What Need to See Before Buying a Bilge Pump Float Switch
There are a few things you should consider before purchasing a bilge pump float switch:
1. The type of bilge pump you have: There are two main types of bilge pumps, automatic and manual. If you have an automatic bilge pump, you will need to purchase a float switch that is compatible with it.
2. The size of your bilge: The size of your bilge will determine the size of the float switch you need.
3. The location of your bilge: You will need to determine where you want to mount the float switch. Some bilge pumps come with a built-in mount, while others will need to be mounted separately.
4. The price: Bilge pump float switches range in price, so be sure to compare prices before making your purchase.
A Guide to Use Bilge Pump Float Switch
A bilge pump float switch is a device that is used to automatically turn a bilge pump on and off. The switch is mounted on the bilge pump and is connected to the bilge pump’s power supply. The float switch consists of a float, a switch, and a lead.
The float is connected to the switch, and the lead is connected to the bilge pump’s power supply. When the float rises to a certain level, the switch is activated and the bilge pump turns on.
Frequently Asked Questions
What Is The Best Price For A Bilge Pump Float Switch?
There is no definitive answer to this question as prices for bilge pumps float switches vary widely. However, one popular option is the bilge pump float switch from Harbor Freight that sells for around $10.
What Makes A Perfect Bilge Pump Float Switch?
The perfect bilge pump float switch would have a waterproof design, be able to handle a high volume of water, and have a long life.
How Does Bilge Pump Float Switch Work?
A bilge pump float switch works by sensing the level of water in the bilge and activating or deactivating the pump accordingly.
What Are Some Things To Remember When Using A Bilge Pump Float Switch?
When using a bilge pump float switch, remember to:
-Turn off the power to the bilge pump before using the switch
-Check the water level in the bilge to ensure that the switch is set to the correct level
-Push the float switch to the “on” position
-Wait until the water flow from the bilge pump has stopped before releasing the switch
How Much Should I Spend On A Bilge Pump Float Switch?
A bilge pump float switch should be installed on any boat with a bilge pump that is used for primary water removal. The switch should be installed near the pump and should have a switch lever for manual operation. The switch should also have a float for automatic operation. A float switch with a range of 4 to 12 inches of water should be purchased.
Final Verdict
A bilge pump float switch is a must-have for every boat. They are inexpensive and can save you a lot of money in the long run.