9 Best Bilge Pump Float Switch – Best Buyer’s Guide


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For your boat to run smoothly and efficiently, the bilge needs to be free of excess water accumulation. In this article, we discuss how you and your boat can benefit from bilge pump float switches. In this article, we’ll examine the most useful bilge pump switch. The switches that can be attached to bilge pumps are many and varied.

Reading our reviews will allow you to make an informed decision regarding your bilge pump float switch purchase. You should consider the following factors when choosing a bilge pump float switch. Besides that, we do a lot more. 

Additionally, we will give you some tips on how to choose the Best Bilge Pump Float Switches. It is important to follow them in order to ensure the safety of your bilge. The lifespan of your boat will significantly increase if you have a functioning bilge pump. There is therefore a great deal of importance in selecting a high-quality Bilge Pump Float Switch.

There are several types of switches available for controlling the bilge pump on your boat. Float switches, however, are generally a better option. Due to the automatic nature of most of them, you won’t have to worry about them until they start failing. Having a control switch is only recommended for boats that are reasonably large.

The best bilge pump float switches have been found for you, so you don’t have to look for them yourself! Buying bilge pump float switches can be a tricky decision, but if you know what you need to know, you can make the right choice.

9 Best Bilge Pump Float Switch





Best Overall

Best Overall

1. Seachoice Submersible 2,000 GPH Bilge Pump

  • Weighs 3.25 pounds

  • 1300-gallon pool

  • Diameter of 1-1/8

Best Affordable

2. Rule 35A Rule-A-Matic Bilge Pump Float Switch

  • 14 amps

  • waterproof

  • affordable

3. AURELIO TECH Bilge Pump Float Switch

  • solid ABS material

  • 18-gauge wire

  • strong and durable

Best  Budget

4. Shoreline Marine Bilge Pump Float Switch

  • Manual electric

  • smart shopper

  • defective unit

5. Attwood 4201-7 Float Switch with Cover, for Bilge Pump

  • small size

  • fully automatic

  • two inches water level

6. Rule 40A Rule-A-Matic Plus Bilge Pump Float Switch

  • commercial-grade

  • high-quality acrylic

  • 14 gauge wire

7. Shoreline Marine Bilge Pump with Float Switch

  • marine-grade

  • impact-resistant

  • easy installation

8. SEAFLO 03-Series Heavy Duty Bilge Pump Float Switch

  • UV-stabilized

  • anti-aging ABS

  • marine-grade

9. Ogrmar Automatic Boat Bilge Pump Float Switch

  • high-quality

  • mercury-free

  • ABS material

1. Seachoice Submersible 2,000 GPH Bilge Pump


  • Brand: SEACHOICE
  • Material: Stainless Steel
  • Color: White
  • Style: Bilge Pump,Submersible
  • Item Weight: 3.25 Pounds
  • Power Source: Ac/dc

It is incredibly easy to eliminate water with the SeaChoice 19301 submersible bilge pump. The ABS plastic material is tough and durable, and the fasteners are stainless steel 304. 

It meets all NMMA certifications and is not intended for commercial use. This pump has a flow rate of 2000 GPH. There are 8 x 7 x 6 inches of product dimensions, and it weighs 3.25 pounds.

In addition to being excellent for boats, we’ve found this pump to be useful in other situations, like in basements. You can repair pipes or get insurance money if you have this auto pump installed in the basement, which can help prevent leaks and corrosion damage. 

Leaky cellars can also be repaired with this product. Even a 1300-gallon pool has been tested with this. With a flow rate of 2000 GPH, this pump is far and away the strongest on the market. Most pumps have a flow rate of less than 500 GPH.

Stainless steel fastening makes it quite durable; we think it’s quite secure. Voltage and amps are 12 and 10 respectively. There is a diameter range of 1-1/8 inches for the outlet. Instructions are included in the box, so setting it up is a breeze. It is highly recommended that you have this because it is extremely durable and power-efficient.


  • ABS plastic construction provides rugged durability.
  • 12 volts. Double blister packs of 600 and 1000.
  • Fasteners are made of stainless steel 304.
  • Certified by NMMA.
  • Commercial use is not recommended.
  • Exceptionally powerful
  • Suitable for submersion and durability
  • Pricing that is affordable
  • Can’t be used commercially

2. Rule 35A Rule-A-Matic Bilge Pump Float Switch, Mercury Free,White


  • Brand: Rule
  • Material: Plastic
  • Color: White
  • Item Weight: 0.25 Pounds
  • Style: Bilge Pumps Switches
  • Power Source: Corded Electric

Lightweight yet powerful, this bilge pump float switch will keep you from drowning! Marine grade “blocked” wire provides enhanced operation, and metal capsules ensure long-term performance. Furthermore, the base can be easily removed for cleaning and maintenance to access the mercury-free snap switch. 

A bilge pump float switch activates the pump when the level of water rises about one inch. Pumps drawing up to 14 amps can be powered by this device. 

The bilge pump is waterproof, fully submersible, and offered by most leading manufacturers. Additionally, a diagram for wiring instructions is included as well as a 2-year warranty. 

You can use this float switch in manual mode by using the on/off switch. Float switch wires are 18 gauge stranded conductors that are about three feet long. 

Saltwater, freshwater, and rainwater all work with this bilge pump float switch. Float switches of the same size can be easily replaced in your setup and are usually the same size. A reliable, user-friendly, and affordable product, it is reliable and easy to install.


  • You can’t go wrong with a Rule product
  • The switch can be easily cleaned by removing it from the base
  • Boaters around the world have chosen the Rule-A-Matic switch year after year
  • A complete seal enhances the performance of metal capsules
  • The wire that is “blocked” for marine use
  • Over one million cycles have been tested on a mercury-free snap switch
  • Installing it is easy and it is a reliable product.
  • Featuring mercury-free snap switches and metal capsules, it is durable and safe to use.
  • At a water level of 1 inch, the pump is activated.
  • The price is reasonable.
  • Two years of warranty are included.
  • There are no screws included.
  • Every four years or so, it should be replaced.
  • Compared to its predecessor, it’s a little bigger.

3. AURELIO TECH Bilge Pump Float Switch for Boat 12V/24V/32V Ignition Protected


  • Material: Plastic
  • Color: White
  • Style: Bilge Pump

The plastic float switch is constructed of solid ABS material, ensuring high strength and durability. It is mercury-free, ignition-proof, and ultrasonically welded to prevent leaks so it is securely and reliably sealed. With a switching frequency of up to 10 million times, this float switch is designed for long-term use. 

It’s made from 18-gauge wire and can be used with 32-volt bilge pumps. Freshwater and seawater can be used with this float switch. A waterproof marine sealant prevents corrosion on its wires, and its contact points are spring-loaded for ease of use. 

With the simple instructions and wiring diagram that come with it, this float switch is simple to use and easy to install. Depending on your preference, it can be controlled manually or automatically through your bilge pump.

Maintenance and cleaning are easy with it since it is fully submersible. It is a simple but strong and durable bilge pump float switch, and it is also available at an affordable price, making it one of the best. Competitor float switches that cost more last longer and perform just as well.


  • Input voltage: 12-24-34V; 20AMP; Model: SFBS-20-01
  • One meter of wire; 18 gauge wire
  • A maximum amp of 20A at 12 volts; a maximum amp of 10A at 24 volts; and a maximum amp of 8A at 32 volts
  • The seal is reliable and secure, not leaking, and has a long life, switching frequency up to 10 million times
  • The product measures approximately 5″ x 1.9″ x 2″; it is ignition protected; it is mercury-free; it is made out of solid ABS material that is extremely strong and durable.
  • There’s something durable, long-lasting, and robust about it.
  • Besides being mercury-free, it is also leak-proof.
  • You can install and use it easily.
  • At an affordable price, it’s a great value.
  • A manual or automatic bilge pump can easily be installed.
  • Hardware for mounting is not included.
  • In this case, the battery may be drained if the device remains in the “on” position.
  • In the event it is not properly secured, it might not stay underwater.

4. Shoreline Marine Bilge Pump Float Switch


  • Brand: Shoreline Marine
  • Material: Blend
  • Color: White
  • Style: Float Switch
  • Power Source: Battery Powered

Manual electric float switches require manual operation to function. DIY enthusiasts easily install float switches between batteries and pumps so that they turn on when the water level becomes too high.

In spite of the fact that this unit is one of the best buys, there is a possibility that you may receive a defective unit once you purchase it. It is imperative that you report this immediately so that you can receive a replacement or, if possible, a refund. 

Installing the pump is easy, and it can be converted to operate as an electric pump without modifying it. In cases where the boat battery can be connected to it, you may not have to install it completely. What is needed is? The connection is made with an inch hose.

As a smart shopper, you understand that there are few options available when it comes to bilge pump float switches. Despite the fact that this float switch is a good buy, you can choose another from the list if you have another option. 


  • This Shoreline Marine Float Switch works well with 12 volts bilge pumps and is a simple and functional fishing boat accessory.
  •  Its automatic lever makes it easy to use and is made from rugged quality material. It is fully submersible and made from sturdy quality material. 
  • Unlike mercury-containing bilge pumps, this automatic bilge pump uses tinned marine-grade wire that works well in harsh marine environments. 
  • Mounting hardware is included with the float for ease of installation.
  • The pump is automatically activated
  • DC Bilge Pump Compatible
  • Submersible unit
  • A small but powerful device
  • It is easy to install
  • Long-lasting
  • Looks fantastic
  • An affordable price
  • When purchasing a unit, there is a risk of receiving a malfunctioning one
  • It is almost necessary to replace them every year since they spoil easily

5. Attwood 4201-7 Float Switch with Cover, for Bilge Pump, 12- and 24-V CE Rated, 4 ¼ Inches L x 3 7/8 Inches W x 1 3/8 Inches H


  • Color: Unspecified
  • Brand: Attwood
  • Style: Bilge
  • Item Weight: 10.7 Ounces
  • Material: Other

Despite its small size, this switch is likely to perform better than other float switches, or at least on par. With the cover part attached, the bilge pump is converted into a fully automatic pump. 

The pump motor is actuated at an angle of 24 degrees using the low profile design, which mounts on any surface. Float switches might not be reliable, and that’s their main drawback.

 The switch operates mechanically without mercury and does not contain mercury. In spite of its ease of use and good fit, the switch will not work when the water level is too high in the pump. 

The pump motor and two inches water level are controlled by a reliable and inexpensive mechanical switch. The wire leads are also not hinged or flexible as they are with poor quality switches or standard switches. 

Float switches for bilge pumps may be useful for your needs. A replacement for your worn-out one is usually an exact match, and it will last as long as your worn-out one.


  • Adapts a manual bilge pump to fully automatic operation
  • A convenient test knob makes it easy to verify whether the switch is working, and a cover offers additional protection
  • It can be mounted horizontally or at a 24-degree angle on any surface
  • The wire connection is 36 inches with a CE rating of 12 and 24 volts
  • Approximate measurements are 5 1/4L x 3 7/8W x 2 7/8H
  • A maximum of 12 amps is drawn when the voltage is 12 volts DC, and 6 amps when it is 24 volts DC.
  • Moisture, fume, as well as electric shock, are not destroyed by the sealed switch mechanism
  • Manufacturers stand behind their products and offer warranties
  • As described, it works perfectly
  • Installation is easy
  • With the cover installed, it is ready to use
  • It has a reputation for being reliable based on most reviews
  • If it is fully submerged, it might not engage
  • The system is not failsafe

6. Rule 40A Rule-A-Matic Plus Bilge Pump Float Switch, 12, 24 or 32 Volt, Moisture Tight Seals , White , Small


  • Brand: Rule
  • Fabric Type: Acrylic
  • Color: White
  • Style: Float Switch
  • Power Source: Corded Electric
  • Item Weight: 6.4 Ounces

The best bilge pump float switch should function for a long time without needing replacement, which is what you hope to find when shopping for the best one. 

There is, however, a problem, and you end up with float switches that do not meet your expectations. The Rule-A-Matic Plus Float Switch is the best choice for you because of this.

This unit works well, but it is not always reliable as advertised. Especially if you have the older mercury switch, this unit might not be the best choice for you. An additional switch cannot be mounted on this switch due to insufficient surface area.

One of the best things about it is that it works great for most people. Hand-picked, commercial-grade materials are used in the production of this unit. An 18-month warranty is included with this product, which is 6 inches tall by 6 inches wide.

There are several good bilge pump float switches to choose from, but this is among the best. Due to its high-quality acrylic construction and US-made origin, this is sure to last you a long time. This pump float switch comes with a two-year warranty upon purchase, so you won’t lose money when you buy it. 


  • The acrylic material
  • Imported or Made in the United States
  • Marine grade 14 gauge wire that is highly abrasion resistant
  • The rugged cover protects against debris and jamming with its strong, integrated impact resistance
  • The test feature is built-in
  • Upon reaching 2″ (51mm), will turn on the pump, and once 3/4″ (19mm) is reached, it will turn off.
  • This pump is designed to draw 20 amps or less
  • High water alarms can also be operated with this device
  • Durable material made of high-quality materials
  • Impact resistance is provided by its sleek and rugged cover
  • In the case of online purchases, the pump is exactly as described
  • Perfectly functional
  • A manufacturer’s warranty is included
  • This lasts much shorter than most
  • The bilge might not drain to the level you expected

7. Shoreline Marine Bilge Pump with Float Switch


  • Brand: Shoreline Marine
  • Style: Bilge Pump, Submersible, Bilge Water
  • Material: Blend
  • Item Dimensions LxWxH: 9.4 x 5.5 x 4 inches

The company is an excellent place to buy a pump, not only for the fact that it is available in many sizes, including 600 GPH, 800 GPH, and 1100 GPH, but also for the performance of the pump.

There is one thing to keep in mind when it comes to the bilge pump since it comes in three different sizes. With marine-grade wiring, you can rest assured that you are always safe. It can also be easily installed and set to your preferences at any time.

It is possible that this pump has a problem, just like any other product. Several customers complain that their product works once, then stops working. A poorly made product won’t last as long as a well-made one.

Furthermore, the manufacturer needs to ensure that the pump is able to handle salty water; otherwise, the pump might not work well. Having so many sizes to choose from, this pump always fits your boat’s size, which is a huge plus. Most customers also praise the ease of installation of the pump. 

The easy installation and impact-resistant housing make this pump worth your time and money. You will be able to use it for a long time.


  • In addition to being easy to install, the pump can be removed after installation to be cleaned and inspected
  • With tinned marine grade lead wires, it is ignition protected, uses a very low operating current of 3 amps, and is ignition protected
  • It has a 600 GPH water pumping capacity and a submersible bilge pump.
  • As soon as a float switch detects water in the tank, it automatically starts the pump and shuts it off as soon as the water is removed.
  • In addition, the 3/4” O.D. hose barb is compatible with 3/4” I.D. hose for bilge use
  • Easily removed and inspected
  • The bottom or sides of the unit can be mounted
  • A minimal five amps of power is required to operate the ignition.
  • A housing that resists impact is included
  • Dropping the pump in water makes it float
  • There is a possibility that you will receive a unit that is not working
  • As a result, you must have several of them every year since they fail quickly

8. SEAFLO 03-Series Heavy Duty Bilge Pump Float Switch for 12V, 24V, 32V


  • Brand: SEAFLO
  • Material: Acrylonitrile Butadiene Styrene
  • Color: Orange, White
  • Style: Bilge Pump
  • Power Source: Battery Powered

There are not a lot of companies that make bilge pump float switches that are as good as SEAFLO. A sleek white and orange finish is featured on this bilge pump float switch. 

A new ultrasonic sealing system is used for maximum durability and longevity, as well as UV-stabilized, heavy-duty, anti-aging ABS material for maximum longevity and strength. 

This mercury-free electric float switch is compatible with bilge pumps up to 25 amps, and its reed switch system ensures long-term operation. As soon as the water reaches a level of 1.77″, the float switch turns on the pump and shuts off when the level reaches 0.79″. 

A marine-grade 14 gauge wire is used for this float switch, and reinforced seals prevent water from entering and corroding it. Mercury-free and easy to install, this float switch fits most mounting patterns in the industry. Corrosion and rot are unlikely problems with this float switch. 

A rugged design makes this float switch durable and capable of lasting up to 10 million activations. A 4-year warranty is also included and the product is affordable.


  • A four-year warranty is provided
  • Once the water level reaches 1.77″ (45mm), the pump turns on, and when the water level reaches 0.79″ (20mm), the pump turns off.
  • ABS material is used to ensure maximum durability and longevity, and new seals have been designed to improve sealing performance
  • Electric reed switch with mercury-free reeds that perform consistently
  • It can be used with systems up to 25 amps using 12V, 24V, and 32V voltages
  • This is an affordable product with heavy-duty quality.
  • You won’t have any problems with the slim design.
  • Installing and using it is easy.
  • Long-lasting and cost-effective compared to the competitors.
  • It is protected against corrosion and rot by specially welded seals.
  • There is only one color available.
  • AC voltage doesn’t work with it.
  • It does not include mounting screws.

9. Ogrmar Automatic Boat Bilge Pump Float Switch Moisture Tight Seals 12/24/32VDC Ignition Protected Mercury


  • Brand: Ogrmar
  • Material: Acrylonitrile Butadiene Styrene
  • Style: Bilge Pump
  • Power Source: Battery Powered
  • Item Weight: 0.1 Kilograms

With 18 gauge wires and a one-meter-long ABS material, this bilge pump float switch will last for years. Bilge pumps up to 32 volts can be used with it. Float switches are used to automatically activate and deactivate bilge pumps when water reaches levels of 2 inches and 0.7 inches, respectively. 

The heavy-duty float switch is designed for challenging applications while being environmentally friendly. Up to 10 million switching cycles can be achieved with this long-lasting device. This float switch is ultrasonically welded to ensure security, reliability, safety, and drip-free operation. 

In addition to being easy to remove from its base, this float switch can also be easily maintained and cleaned. It has ignition protection and a completely sealed metal capsule which enhances flawless operation. Freshwater and seawater can both be used with this strong, durable device. 

These bilge pump float switches’ wires are sealed with waterproof marine sealant to prevent rot and corrosion. There are many bilge pump float switches available, but this one is one of the best because it is high-quality, mercury-free, and reasonably priced.


  • The maximum amps at 12 volts are 20 amps; at 24 volts they are 10 amps, and at 32 volts they are 8 amps. There is a length of 1M and a gauge size of 18AWG on the wire.
  • Easy cleaning is possible with the switch’s removable base.
  • A long lifespan, switching frequency of up to 10 million times, and ultrasonic welding that forms a seal that is reliable and secure.
  • The pump should be turned on when the water level reaches 2″ (51mm); it should be turned off when the water level reaches 0.7″ (19mm).
  • A heavy-duty flow switch is suitable for the most demanding applications. Environment-friendly.
  • This bilge pump float switch is good quality and inexpensive.
  • Ignition protection and mercury-free.
  • You can install and use it easily.
  • The bilge pump can be automatically activated when there is 2″ of water in the bilge.
  • The battery lasts for a long time.
  • There’s a chance the switch may get stuck in the “on” position since it’s lightweight.
  • Mounting hardware is not included.
  • One color is available.

How to Choose the Best Bilge Pump Float Switch?

When purchasing a bilge pump float switch, it is important to consider many factors. As there are many features and factors to consider, choosing the right one can be a challenge.

The task of buying a house for the first time can be daunting if you are a first-time buyer. As long as you consider the following factors, you will be able to choose one that will meet your requirements.

1. Size of Your Boat

The size and type of water you plan to use your boat in should be considered before you purchase one. In the case of small boats with outboard motors, a hand float switch will be required. Water can easily be drained out this way. An electric pump will be needed if the boat is large or slightly larger. Your boat’s size and type will determine its size and type. 

2. Type of Pump

It is important to determine whether you need an electric or manual bilge pump. Electricity is used by some, while boat batteries are used by others. In manual pumps, one pumps water out of the boat with their hands without the use of batteries. Make sure you decide which one suits you and be sure you’re making the right choice.

3. Ease of Installation

A bilge pump float switch can be found in many different designs and types. There are some types of installations that need to be done the standard way, while there are some types that need to be done by a professional. Choosing one that you can install yourself is the best solution before hiring someone to do it for you. Also, if you’re a DIYer and need to perform challenging tasks, you might want to buy one that is difficult to install.

4. Capacity of Your Pump

As a general rule, float pumps are rated based on the number of gallons they can remove per hour. In gph, it is expressed. Because hand bilge pumps vary in capacity depending on how fast they are pumped, you won’t find this denotation on them. A small pump can reach a flow rate of up to 750 gallons per minute.

Pumps rated at 750 gph, however, don’t necessarily empty 750 gallons in an hour. As voltage conditions and vertical distances of water to be pumped decrease, the pumping capability decreases. While the hose’s condition is also important, it is better to purchase one with a higher rating in the long run. 

5. Number Of Float Switches You Need

It is recommended that each boat that is over 16 inches to have a minimum of bilge pumps. However, you need to ensure that each pump that you carry with you is of high quality.

If your boat comes with more than one compartment on its underside, then you require a minimum of one pump. It is good to have two for each of the compartments. Therefore, when buying two, you need to ensure that you are purchasing from the same company and of the same specifications.

Frequently Asked Questions

What Size of a Bilge Pump Float Switch Do I Need?

It is important to know the size of your boat in order to determine which size float switch you will need for your bilge pump. Your boat will need the following sizes of bilge pumps, according to my thorough research. It is necessary to get one with a 1,000 gph rating if yours is less than 200 feet long. The feed should be rated 4,000 gph for feeds of 20 to 25 feet, and 2500 gph for feeds of 25 to 32 feet.

How Does The Bilge Pump Float Switch Work?

The bilge pump float switch work as a pump that uses a float switch or a liquid level sensor and works with two main components, the pump, and the float switch. The pump is activated when the sensor is triggered.

Typically, tanks use a small impeller at the bottom to move water. Through the vertical tube, the water is pushed. Boats are pushed out of water.

Do These Pumps Turn on Automatically?

These pumps are manufactured by many companies these days. It is impossible to create a single answer to this question since each manufacturer tries hard to come up with a unique pump.

Pumps can be manually operated or automatically operated. When the boat’s water level changes, most automatic pumps automatically turn on. In contrast, manual ones need to be turned on when there is high water.

How Do I Know The Right Manufacturer?

Choosing the right manufacturer can be challenging for first-time buyers. The best way to determine which float switch manufacturer to choose is to read online reviews and find out which brand is reputable.

In order to find out which manufacturers are mentioned in certain reviews, you have to read through several. For more information about their business and pumps, visit their websites.

How Will I Test My Pump Upon Purchase?

Manufacturers always provide a manual with the pump when you purchase it, so you can refer to it when you install or test it. It is important to remember, however, that when the water switch is set correctly, the pump should run three times before it shuts off. You can activate the bilge pump float switch by placing a wet rag over all the sensors for up to 8 seconds.

I Want To Know About The Warranty Information of a Float Pump Before Purchasing It

Before purchasing a bilge pump float switch, make sure you check the warranty information. In conjunction with the float switch’s user manual, you always receive this information.

There are different warranties offered by different manufacturers. In order to ensure that you get a quality, reliable unit, make sure it is backed with a warranty provided by a manufacturer who trusts and stands behind its products.


With our review in hand, you should now be able to make an informed decision. To make your search easier for this year’s best bilge pump float switch, I took the time to review the top picks. It is always the case that one of these products stands out from the rest after reviewing them.

Overall our best pick is Seachoice Submersible 2,000 GPH. It has the highest flow rate of 2000GPH, is NMMA certified, and is made of high-quality ABS plastic material. These features are made the best ones that deserve to be mentioned on the top one.

Here is 2nd option of Rule-A-Matic Plus Float Switch. You can be confidently assured that it was made with hand-picked materials since it is made in the US. You will save time and money by buying it because it will last longer than others. It is also an affordable option.

3rd one is the Shoreline Marine Bilge Pump Float Switch which is good for budget-friendly users who want a good quality product in a low price. It can last longer and is worth your hard earned money.

There is also a two-year warranty on it, so you don’t have to worry about that. There is clear and visible warranty information upon purchase. This one is quality from a manufacturer who has trust in their products.

The majority of manufacturers conceal warranty information, but for this one, you can be confident that you are getting quality from a manufacturer who has confidence in their product.


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