Best Bilge Pump Float Switch 2021 – Buyer’s Guide

By Harry ! Last Updated: January 01, 2021

When you are out on the beach enjoying your day of fun, the last thing that you want to see is water accumulating in your boat. Nonetheless this is what you need to be prepared for, and that is why you need to have the best bilge pump float switch at hand. These are meant for shifting water overboard. 

Bilge Pump Float Switch reviews

Bilge pumps are electrically powered and also there are some which are manual. An electric bilge pump float switch is for large craft, while the manual ones are meant for rowboats, kayaks and canoes.

We took it upon ourselves to research on the top bilge pump float switches and find out which is the best one. The research process was vigorous and took us more than 72 hours. 

In this text therefore, you will find out what we found to be the best and the ones we recommend. We hope that the piece will guide you to make the right decision when choosing the better bilge pump float switch to buy.

Selecting the Best Bilge Pump Float Switch in January, 2021






1. Shoreline Marine Bilge Pump with Float Switch

12 Volt

2. Rule Rule-A-Matic Plus Float Switch

(Editor’s Choice)

12, 24 Volt

3. Rule SuperSwitch Float Switch

12, 24 or 32 Volt

4. attwood 4201-7 Float Switch with Cover

12, 24 Volt

5. Shoreline Marine Bilge Pump Float Switch

12, 24 Volt

5 Best Bilge Pump Float Switch - In Depth Reviews 

1. Shoreline Marine Bilge Pump with Float Switch 

This is the perfect company to buy a pump, not only because it comes in up to three excellent sizes, which include 600 GPH, those of 800 and the 1100 GPH, but also because of the pum’s performance.

One thing, the bilge pump will work best in any size of the boat since you can choose between the three sizes. The marine-grade wiring ensures that you are always safe and is safe to install, and you can set it anytime you need.

There might be a problem with this pump, just like what you’d expect with any other products. Some customers complain that the product worked once, and that was it. You should also be aware of poorly made products that won’t last for long.

The pump also might not be the best to use on salty water; therefore the manufacturer needs to ensure that they build one that can withstand salty water.

When it comes to the positive side, this pump works so well, and comes in several sizes, meaning you will always get one that fits the size of your boat. The ease of installation is also another aspect that most customers tout the pump for. 

Final Verdict
This pump is worth your time and money as it is easy to install and has an impact-resistant housing. It will serve you for a long time.


  • Easy to remove and inspect
  • Can be mounted from its bottom or the sides
  • The ignition is protected and uses minimal five amps operating power
  • Comes with an impact-resistant housing
  • The pump floats when dropped in water


  • There are chances that you can receive a non functioning unit
  • They fail quickly, and thus you need to have several each year

2. Rule Rule-A-Matic Plus Float Switch, Covered - (Editor’s Choice)

When shopping for the better bilge pump float switch, you hope that you will find the best one that won’t need any replacement anytime soon. However, things are different, and it turns out that all that you get are substandard boat float switches. This is why you should invest in the Rule-A-Matic Plus Float Switch.

The unit is nice, but at times it might not work as advertised. This unit might not be the best option, especially if you are having the old mercury switch since it is bigger. This switch does not have enough surface for mounting a new switch.

The best thing, though, is that most people love it because it works great. This unit is made in the United States, using hand-picked, commercial-grade material. It is 6 inches in height and 6 inches wide and is backed by a warranty.

Final Verdict
If you are looking for a good bilge pump float switch, this is among the best one to buy. Since it is made in the US, you are sure that it will last you for some time since it is made using high-quality Acrylic. With two years warranty upon purchase, this pump float switch is not losing money when you purchase. 


  • Made with high-quality material for durability
  • Its cover is sleek and rugged thus impact resistant
  • The pump comes just as described if you are purchasing online
  • Works perfectly
  • Backed by the manufacturer warranty


  • Compared to most, this does not last long
  • It might not drain the bilge to your expected level

3. Rule SuperSwitch Float Switch

These supper switches are meant for the toughest application. They also are backed up by a two years warranty. The large ultrasonically welded provides the switch the ability to float for less when on or off cycling. In the same breath, these switches use sealed metal capsules for flawless operation.

There are only a few backsides of this float switch. Some customers complain that it works well but fail early. This, however, is not a blanket blame, and it depends on the unit. It is, therefore, upon the manufacturer to carry out a thorough test on each unit before they release it to the market.

When using them, you are sure that they won’t corrode. One, however, needs to use them with pumps that draw up to 20 amps. Also, they are ignition protected and are available with a fuse holder a switch guard, as well as an additional guard that prevents debris from jamming float in when on-off, or on position.

Final Verdict
There seems to be some inconsistency in the quality of these units. Some work well, but there is a possibility of finding one that fails too soon. Therefore, though it is among the best, it should come as a last resort. 


  • Relatively affordable
  • Easy to use
  • It is wider than a standard switch
  • Installation of the pump is easy
  • Backed by the manufacturer’s warranty


  • Might not be the best float switch
  • Does not last long

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

Though it comes in a small design when compared to other float switches, this switch will deliver the best, or at least averagely. This bilge pump float switch has a cover part that converts the pump to fully automatic operation. It features a low profile design that mounts on whatever surface, which actuates the pump motor at a 24 degrees angle.

The bad side of this float switch is that it might not be reliable. It doesn’t come with mercury and is operated using a mechanical switch. While it fits well and is easy to operate, you will soon realize that the level of water in the pump is too high to activate the switch. 

It comes with a reliable and inexpensive mechanical switch which actuates the pump motor and two inches water level. Another plus is that its wire leads do not hinge or flex with the boat as the standard or poor quality switches do. 

Final Verdict
This is a good bilge pump float switch that will suit your needs. In most cases, it will be an exact replacement to your worn out one, and will equally last you for long.


  • The manufacturer stands by the product and backs it with a warranty
  • Works perfectly, just as described
  • Easy to install
  • It comes installed with a cover
  • According to most reviews, it is touted to be reliable


  • Might not engage when it is fully submerged
  • It is not fail-safe

5. Shoreline Marine Bilge Pump Float Switch

This is a manual electric float switch which requires to be turned on manually to work. If you are a DIYer enthusiast, you can easily learn how to install the float switch between the battery and the pump so that it turns on whenever the water level gets so high.

This unit is the best buy; however, there are chances that you can get a malfunctioned unit upon purchase. Whenever this happens, you need to report immediately, so you can get a replacement or better still get a refund. 

The pump is easy to install, and one doesn’t need to modify it to run as an electric pump. You can choose not to install it completely if there is a way of having it connected to the boat battery. It requires a ¾ inch hose for connection.

Final Verdict
You always have many options of bilge pump float switches to buy, but when you are a smart shopper, you understand that your options are lean. This is a good buy; however, if you have another option, you can choose another float switch from the ones listed here. 


  • It is small yet so powerful
  • Installation is easy
  • Lasts for long
  • Has great looks
  • Affordable


  • There are chances of one receiving a malfunctioned unit upon purchasing
  • They spoil easily, so you need to have a unit almost each year

How to Choose the Best Bilge Pump Float Switch

There are many factors to consider when purchasing a bilge pump. Choosing the right one can be a pain-staking experience as there are a lot of features and factors to consider. If you a first-time buyer, then you are in for a daunting task. However, with the following factors, you will always purchase one that suits your needs.

The Type of Pump

You need to be sure whether you require an electrical or manual. While some run on electricity, some use the boat battery. There are manual ones that do not require batteries, and these require one to pump the water out of the boat using your hand. Therefore, you need to be sure and make a decision on which one suits you.

The Capacity of Your Pump

The capacity of a float pump means the number of gallons that the pump can remove within an hour. It is denoted as gph. You won’t see this denotation on the hand bilge pump because its capacity depends on how fast one is pumping. Small pumps have ratings of from 500, all the way to 750 gph.

This, however, does not mean that a pump rated 750 gph empties 750 gallons within an hour. Pumping capability reduces with the real world voltage conditions as well as the vertical distance that the water to be emptied travels. The condition of the hose also matters, but in the long run, it is better to buy one with a higher rating. 

The Ease of Installation

There are many types and designs of bilge pump float switches. Some require the standard way of installation, while some are hard to install and need a professional to do it. If you are not ready to hire a professional to install yours, then you should find one that you can fix one yourself. You also buy one that is hard to install if you are a DIYer and need to try challenging tasks.

The 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 minimum 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.

The Size of Your Boat

Before purchasing one, you need to consider both the size of your boat as well as the water that you will be using the boat in. For a small boat with an outboard motor, then you will require a hand float switch. This will take out any water collected easily. If the boat is slightly large or is large, then you will need to buy an electric pump. Therefore, the size and type of your boat. 

Best Bilge Pump Float Switch Buyer’s Guide

Best Bilge Pump Float Switch Buyer’s Guide

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

Knowing the size of your boat will help you get the right size of a bilge pump float switch. After thorough research, I believe you need the following sizes of bilge pumps for your boat. If yours is less than 200 feet, then you require one that is rated 1,000 gph. For those of 20 to 25 feet, a 2500 gph, a 25 to 32 feed should use one rated 4,000 gph.

Do These Pumps Turn on Automatically?

These days, there are many manufacturers of these pumps. Every manufacturer tries hard to come up with a unique pump, and therefore, there can never be one answer to this question. There are manual and automatic pumps. Most of the automatic pumps turn on automatically after detecting the level of water in the boat. Manual ones, on the other hand, requires one to turn them on when the water level is high.

How Does The Bilge Pump Float Switch Work?

These pumps work with two main components which are the pump and the float switch and the liquid level sensor or the float switch. When the sensor is triggered, it turns on the pump. Usually, a tank works with a small impeller which is located at the bottom. This one pushes the water through the vertical tube. The water is pushed out of the boat.

How Do I Know The Right Manufacturer?

If you are a first-time buyer, knowing who the right manufacturer is hard. However, you need to do your research by reading online float switch manufacturer reviews and get to know about reputable brands. You need to read through several reviews as it is only through this that you will notice certain manufactures being mentioned. You can then visit their websites to learn more about their business and their pumps.

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

The warranty information is one of the most important things to check before committing to buy a bilge pump float switch. This information is always provided to you along with the user manual of the float switch. Different manufacturers have different warranties. What is important, however, is to ensure you purchase a unit from a manufacturer that trusts and stands by their pumps and backs them with a warranty.

How Will I Test My Pump Upon Purchase?

When you purchase the pump, the manufacture always provides you with a manual to refer to when installing or testing the pump. However, when you have correctly installed your unit, the water switch should turn on the pump three times before turning off. Use a conductive material like a wet rag across all the sensors for the delay time of up to 8 seconds to activate the bilge pump float switch.

Final Verdict

Having gone through our review, I believe you are now in the right position to make the right decision. I took time to ease your search for the best bilge pump float switch to this year. After reviewing these products, there is always one that is way better than the rest.

This would be the Rule-A-Matic Plus Float Switch. This one works excellently, and the fact that it is made in the US, you can rest assured that it is made using hand-picked material. It lasts longer than most that you will buy, and thus it will save you money and time.

Also, you do not have to worry about warranties as a two years warranty backs it. Upon purchase, the warranty information is clear and visible. Crafty manufacturers tend to hide the warranty information, but for this one, you rest assured that you are buying quality from manufacturers who have trust in their products.


  1. hatch sandwich

    Thanks , I’ve recently been searching for info about this topic for a while and yours is the best I have discovered so far.
    But, what concerning the bottom line? Are you positive concerning the supply?

  2. Robert

    Try Ultra pump switch they last decades cost a little more but saves your boat saves money every year you would have to replace those cheap little flapper switches UL listed industrial quality manufactured in Florida for 30 years

  3. Francisco V.

    Waiting for another article. I was referred to article by my friends. I really needed something readable like this. I’ll be looking forward to make a purchase on the best bilge pump float switch. Presumably, this was catalyst to my buying decision.

  4. Linda D.

    I’ve been surfing around on my web for not less than 9 hours today, yet I found just ordinary articles here and there. This article came just few minutes before I lost hope. I like it. It’s stunning and alluringly worth for me.

  5. Reed M.

    It takes a lot of sacrifice and dedication to come up with such an influential article. I even though what it took for the writer to prepare this content. He has a nice understanding on the niche and good choice of words.

  6. Jesse R Smith

    One thing I like about this article is the buyer’s guide section. I have being having problems with my pump; little did I know there is customer support from the manufacturer. I’ve reached them through their website and I’m looking forward to get help.

  7. Ellie Pearce

    My model is powerful and compact. It here that I read and made up my mind after debating whether I need a bilge pump float switch pump or not. It’s doing very good. Thank you for sharing impeccable information to us.

Leave a Reply

Your email address will not be published. Required fields are marked *