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Finding the Best Marine Freshwater Pumps for Your Boat, RV or Camper

Written by J. Harvey / Fact checked by S. Numbers

Water is essential when boating. From showers to sinks, you need water for a more comfortable life aboard. To ensure that there is always a quick and consistent supply, the best marine freshwater pump is a must-have.

best marine freshwater pump

However, choosing a fresh water pump is overwhelming. There are many variables to take into account, from capacity to noise. You must think about its ease of installation and use as well as its price. If you are looking for a freshwater pump for a boat, continue reading to find some of the top products and their impressive features.

sailboat water pump

  • Easy installation
  • Generates minimal noise
  • Automatically starts and stops

sailboat water pump

  • Easy to access
  • Impressive technical specs
  • Ideal even for compact spaces

sailboat water pump

  • Good choice for small boats
  • Comes with a rubber mount
  • Has protection against ignition

Table of Contents

1. SEAFLO 123ABC Self-Priming Pump

2. ieik water pump, 3. seaflo sea-2834 freshwater pump, 4. uniclife uniclife-ul204-1 water pump, 5. sicce sic104 syncra silent 1.0 multipurpose pump, 6. shurflo 4.15e+81 aqua king ii 4.0 freshwater pump, 7. amarine made 21 series fresh water pump, 8. jerepet aquarium water pump, 9. ommo freshwater pump, 10. amarine made freshwater pump, 11. camptemp freshwater pump, 12. jabsco q401j-115s-3a marine freshwater pump, factor to consider when choosing marine freshwater pump, who makes the best marine freshwater pump, how does a freshwater pump work on a boat, how to prime a freshwater pump on a boat, how do you clean a freshwater tank on a boat, best marine freshwater pump reviews.

This on-demand and general-duty pump is a great option for small boats , supplying water up to two fixtures. It is ideal for moderate-pressure and high-flow environments. It has a self-priming feature up to six vertical feet and delivers a flow rate of up to 3 GPM.

One of its most notable features is the three-chamber diaphragm, which is powered by a reliable motor. This means that the flow of the water remains consistent even when the pressure isn’t high.

I love this marine freshwater pump because of its easy installation. Even for first-timers, the assembly is a breeze. It comes with detailed instructions from the manufacturer. Wiring is simple and it requires only minor adjustments when fitting the pipe.

This isn’t one of those pumps that run continuously. To protect the motor, the unit stops working once it is too hot. It has thermal overload protection to prevent damage from running even when the motor is exhausted. Once it has cooled down, the pump automatically restarts.

Noise is a common problem in many freshwater pumps. But, this pump generates minimal sound even when it is operating. It has a decibel rating similar to an air-conditioning unit , so it isn’t annoying at all. The base has semi-rigid rubber feet, which is effective for noise reduction.

  • The three-chamber diaphragm ensures consistent water flow
  • Easy installation even for novices
  • Automatically starts and stops to protect the motor
  • Generates minimal noise when operating
  • Does not accept a conventional garden hose adapter

If you are looking for an affordable 12-volt marine water pump, this is a great option. Despite being an economical model, it delivers decent performance. It has pretty impressive specs too. This pump has a pressure rating of 60 watts, a water flow of 1.35 GPM, and a pressure of 116 PSI.

The pump comes with a standard.5 FIP thread, which is compatible with a conventional garden hose. As such, I don’t have to buy complicated connectors, which makes it economical. The hose is easily accessible from hardware stores. It is already inclusive of clamps and brass fittings as well.

Another good thing about this pump is its construction. It has rubber on its base, which minimizes any vibrations. Also, this prevents excessive movements of the motor when it is running to prevent premature wear.

I love how compact and portable this pump is. It is a great option for small boats as it won’t consume a lot of space. Despite being a tiny pump, its functions are not compromised.

  • A great choice for budget-conscious buyers
  • Has impressive technical specs despite being affordable
  • Uses standard hoses that are easy to access
  • Prone to leaking
  • Makes a loud noise

This 12-volt freshwater pump is an incredible choice if you have a small boat. It has a pressure rating of 35 PSI and a flow rate of 1.2 GPM. The specs aren’t as high as its more powerful counterparts, but that should not be an issue as it is not designed to power water systems in large vessels.

Many pumps with inferior construction suffer from ignition problems and overheating. That isn’t the case with this model. It has built-in features for thermal protection, which protects the motor from getting too hot. The self-priming motor automatically turns on and off when I open or close the tap, preventing it from overworking.

When a water pump runs, vibration is a problem. Excessive movements can damage the motor. This model, however, has a rubber mount to inhibit damage that the trembles might cause. It is effective for noise reduction as well.

What I love about this pump is that it does not drain my battery quickly. Thanks to its low power draw, it is energy-efficient even when operating at its peak. Another good thing about this freshwater marine pump is its versatility. It is not just for boats and RVs. It delivers superior performance even for agricultural applications.

  • A good choice for small boats
  • Has protection against ignition and thermal overload
  • Comes with a rubber mount to minimize damage from vibrations
  • Professional-grade construction handles multiple applications
  • Weak injection molds and barb connections

sailboat water pump

Before anything else, this isn’t your conventional boat freshwater pump. Instead, this is a pump that is more commonly used in aquariums and aquaponics. It allows proper circulation to keep the water clean and fresh.

One of the most innovative features of this pump is its smart controller. I can choose from 99 speeds, depending on what my specific application requires. There is a ten-minute pause, which comes in handy for feeding. Plus, it has a memory function, so it automatically remembers the previous setting when it restarts.

With multiple protective features, I am confident that this pump is safe to use. For instance, it does not run when there is no water, eliminating strain on the motor. The pump also has protection from being stuck. Moreover, it is completely submersible. The low voltage is a good safety feature as well.

Its shaft construction is also remarkable. It is made of ceramic, so it isn’t easily prone to wear. This composition extends its service life compared to models with propellers that are made of weaker materials.

It is commendable because of its three-phase six-pole motor. It significantly reduces energy consumption, making the pump up to 65% more energy-efficient than many of its competitors.

  • Easy to operate using the smart controller
  • Has multiple layers of protection
  • Comes with a long-lasting ceramic shaft
  • Energy-efficient three-phase six-pole motor
  • Has a fragile plastic body

sailboat water pump

One thing that I love about this pump is its versatility. It is not just for aquariums and water fountains. It works for other submersible applications that need a high-performance pump. I can use it well in both fresh and saltwater settings.

With a convenient flow regulator, it is a breeze to customize the functions of the pump depending on what a specific application requires. It has a knob on the side for controlling the water, which is adjustable up to 215 GPH.

The manufacturer designed this pump with the needs of users in mind. So, maintenance is effortless as I can do so without using any tools. I can pull the pump apart by hand when it is time for cleaning and easily remove any dirt and debris that clog the system.

Aside from the pump, it is inclusive of stepped hoses. It speeds up the assembly the moment it is unboxed. Aside from that, this pump boasts amazing construction that guarantees longevity. One of the reasons for this is its long-lasting shaft, which is made of 316 stainless steel.

  • Versatile applications beyond aquariums
  • Includes stepped hoses for quick assembly
  • Adjustable flow rate for different applications
  • Easy maintenance without requiring any tool
  • Generates a lot of noise and vibration

sailboat water pump

Built for boats with multiple fixtures, this pump provides pressure just like you are at home. You can use two taps at the same time without worrying that the flow rate is affected. It has a power of 10 amps and a capacity of 4 GPM, so you can expect reliable performance.

With its built-in mechanical bypass, it adjusts the flow of the water depending on what the situation requires. I don’t need to use an accumulator tank. This feature also allows operating with minimal cycling even in low-flow conditions.

The durability of this pump is equally commendable. It has an electro-coated shell that protects the motor from external elements, such as dirt and dust. There are O-rings that seal the connections to avoid water and moisture penetration. Even the wires are fully sealed to minimize damage.

The ignition and thermal protection are crucial for extending the lifespan of this marine pump. These features prevent the motor from overheating, even if it is operating at its peak capacity.

Another compelling reason to choose this marine pump is the three-year warranty that accompanies it. It shows how confident the manufacturer is about the workmanship of their product.

  • Comes with a three-year warranty
  • Has a built-in mechanical bypass to regulate the flow of water
  • The durable shell protects the motor from damage
  • Prevents the motor from overheating
  • Not for people on a budget

sailboat water pump

This is a high-quality automatic water pump with a pressure rating of 35 PSI. Additionally, it has a low current draw, making it extremely efficient. Even if the pump is running for a long time, I am not concerned that it will drain my boat’s battery.

Aside from its efficiency, it is also a quiet marine freshwater pump. The motor won’t be a disturbance even as it runs. Beyond being quiet, it has minimal vibrations. I attribute this to the rubber mounts that absorb shock and prevent too much movement of the pump.

Like many of the top options for freshwater pumps for boats, it comes with a self-priming motor. This allows it to run dry without the risk of destroying its engine. There is no potential damage even when it is above the liquid that it is supposed to pump.

When pumps run continuously at their peak capacity, they overheat because there is too much strain on the motor, increasing the chances of breakdowns. Good thing, this product comes with a built-in thermal protector.

The quick installation of the pump is a plus. No experience is necessary to assemble the unit quickly as it includes a detailed manual for guidance.

  • Has a low current draw for energy efficiency
  • The motor runs quietly
  • Equipped with a self-priming motor that can run dry
  • Built-in thermal protection to avoid excessive heat
  • Generates low water output

sailboat water pump

For quick and easy maintenance of water in your aquarium, it is hard to go wrong with this pump. It is powerful, offering an output of up to 800 GPH. Despite this, it is economical and energy-efficient, running at only 28 watts. This is a great way to save battery!

Many aquarium pumps are too loud, which can be annoying. That won’t be the case with this model. It has a noise output of only 30 dBa, similar to whispering. It is almost impossible to notice that the motor is running, unlike others that can be too annoying.

The durable motor is a plus. One thing that makes this possible is the automatic shut-off feature. Once there are blockages or the pump is running dry, it will immediately stop. This will prevent putting too much strain on the motor before it breaks down. The magnetic motor has a steel shaft and favorable anti-corrosion properties.

It comes with an external controller, which makes it convenient to operate the pump and customize its functions. I can pick from six speeds, adjusting the flow rate from 30 to 100%. It also has flashing indicator lights for ease of monitoring. The display shows error messages for a quick diagnosis when there is a problem.

  • Has a high-performance but energy-efficient motor
  • Low noise output of less than 30 dBa
  • Automatic shut-off prolongs motor life
  • Comes with a convenient external controller
  • No strong brand recognition

sailboat water pump

From water taps in boats to motor homes, this is an outstanding pump. It has an exclusive design that ensures smooth and consistent flows of water in various environments. Besides, this pump has a power consumption of 36 watts, which makes it energy-efficient.

With a double-sealed body, it resists external elements that can speed up wear. It has good protection from dust and moisture to shield the motor and internal components. It inhibits corrosion and other potential damages resulting from high temperatures as well.

The automatic diaphragm cut-off is another good feature. It immediately stops pumping water after reaching the maximum pressure of 85 PSI, and once the pressure is back to normal, it restarts. This feature effectively prevents the motor from overheating.

This pump is also equipped with a self-priming feature. I can mount it above a water tank without problems, like the water back flowing into the pump.

I am also a fan of how this pump isn’t too noisy. It has a rating of 70 decibels, which is almost equivalent to a regular conversation. If this is still too loud for you, a good solution is to place a box on the diaphragm for noise reduction.

  • Has an exclusive design for smooth water flow
  • Low wattage for energy-efficient operation
  • Double-sealed body makes the pump durable
  • Automatically stops when pressure is more than what it can handle
  • Does not come with an on-off switch

sailboat water pump

Pumping water onboard does not have to be difficult. This pump ensures that you can easily access freshwater at different parts of the boat. It has a 12-volt motor that delivers a pressure of 55 PSI and a flow rate of 5 GPM. The best thing is that, since it has a low power draw, it is energy-efficient. It won’t quickly drain my battery as well.

The versatility of this pump is another impressive feature. The threaded connections will accept different fittings. Simply put, it is compatible with various connections on any outlet, so there’s no need to buy a special adapter.

With a bypass, this pump is quieter than many of its counterparts. It is responsible for the reduction of vibration, and as a result, eliminates excessive noise. It stays quiet even when operating at its peak. The bypass also lessens the wear on pipes.

When pumps run dry, they are easily susceptible to damage. If it operates without liquid, it is vulnerable to strain, which can damage the motor and shorten its lifespan. Good thing, this model has a self-priming feature to prevent damage.

  • Requires minimal power for efficient operations
  • Threaded fittings accommodate multiple connectors
  • Comes with a bypass that reduces noise and pipe wear
  • Has a self-priming feature
  • Durability can be an issue

sailboat water pump

This 12-volt marine freshwater pump with output of 1.6 GPM, can be used for water taps and outdoor showers. It runs continuously for 60 to 90 minutes. After reaching its peak, the motor automatically turns off and cools down for 15 to 20 minutes before starting again. This intermittent pumping is a great way to minimize overheating.

While it is an affordable pump, it does not compromise durability. It has sealed switches, which inhibit the penetration of moisture and water, thereby, protecting the internal components. To add, it has electro coating to prevent corrosion. This means that even with constant water exposure, the parts of the pump won’t easily rust.

A common problem in many inferior pumps is that they are noisy. Luckily, this model has a whisper-quiet operation. I can hardly notice that it is pumping water on my taps. More so, it does not vibrate a lot thanks to its soft rubber mount.

Even if it is your first time using a pump, you will not be overwhelmed. It is built with the needs of users in mind. There are no complications from the installation to operation. Even the maintenance won’t require too much on your end.

  • Automatically cools down after continuous operation
  • Sealed switches to prevent water penetration
  • No excessive noise and vibrations
  • Easy to install and use
  • Minimal reviews are available online

sailboat water pump

Regardless of small or large applications, this Jabsco freshwater pump has your needs covered. It has a water output of 4 GPM, making it capable even in demanding applications. With its flow rate, it simultaneously powers four outlets.

This pump will withstand many years of use without showing a decline in terms of functionality. The motor comes with a full enclosure to inhibit water intrusion. The shell is powder-coated for corrosion protection. Moreover, its co-molded diaphragm helps in minimizing wear.

Installing and maintaining this model won’t be a headache. It has quick-connect fittings that will simplify the assembly. Even for long-term storage, the winterization of the pump does not have to be complicated.

It has an integrated bypass valve, which is the one responsible for the smooth flow of water from the source to the taps. It reduces switch cycling while allowing a quiet and efficient operation.

With a sealed pressure switch, I can use the pump on demand. This means that I can turn it on or off manually when necessary.

  • Has a high output that serves four outlets at the same time
  • Heavy-duty construction for long serviceability
  • Quick-connect fittings allow easy installation and maintenance
  • The sealed switch allows on-demand operation
  • An integrated bypass allows smooth flow of water
  • One of the most expensive pumps on my list


A marine pump supplies a consistent flow of water on the boat, making sure that there is enough pressure to reach the tap from the source. It transports the water from a lower level to a higher level, such as a faucet, shower, or dishwasher. Without the pump, the water will not move out of the tank.

The system starts by pressurizing water in the head of a pump. As the shaft rotates, it pushes the water to the diaphragm. The diaphragm will press and release more water as the water comes out of the tap. When you turn off the faucet, the pump stops working, preventing water from moving continuously.

Types Of Marine Freshwater Pumps

Freshwater marine pumps are available in two main types – manual and electric. Manual pumps will require muscle work as you need to manually push it for water to travel to the hose. On the other hand, electric pumps are more convenient, quick, and user-friendly. It has a motor that powers the movement of the water.

Benefits And Drawbacks Of Marine Freshwater Pumps

The biggest benefit of using a freshwater marine pump is that it provides a steady supply of water. It ensures the right pressure depending on the flow rate of the tank. By using a pressurized system, it quickly moves the water from the source, dispensing it onto the tap. They are compact and energy-efficient.

It is hard to think of any drawback of a freshwater pump, except maybe for the cost. Nevertheless, many are affordable, including most of the models in this guide.

Buyer’s Guide

If you have no idea of what to pick, here are some of the most important considerations:

  • Voltage: The products above all have 12 volts, which are ideal for small to medium boats. For larger boats and heavy-duty applications, 24-volt pumps are more suitable.
  • Flow Rate: Expressed as GPM or gallon per minute, it describes the ideal output of the pump. At the very least, the pump should have 1 GPM. For more demanding users, 2 to 3 GPM is a good choice.
  • Pressure Rating: Another important technical spec, it indicates the resistance that the pump can hold. It will generally range from 20 to 60 PSI depending on the chosen model.
  • Noise: Noise is inevitable when a pump is working. Nonetheless, some are quieter than others. I recommend looking for a model with a low decibel rating.
  • Vibration: Aside from noise, excessive vibration is one more thing that makes pumps annoying. Some products have vibration dampeners, such as rubber on the base.
  • Run-Dry Feature: Pumps are susceptible to damage when they run dry. When there is no fluid, the components are more prone to wear. With a run-dry technology, the pump detects the absence of water and automatically shuts off.
  • Thermal Protection: This is another feature that prolongs the life of the motor. It shuts the motor the moment that it reaches its peak capacity. It cools down before it starts pumping water again.
  • Energy Efficiency: Even if a pump is small, some models are quite power-hungry. Especially if you will connect it to a battery, pick a pump that has a low power draw.
  • Ease of Use: From installing the pump to its operation, it must be user-friendly. The unit should come with an instruction manual and automatic features.

Care And Maintenance

Like other parts of a boat, freshwater pumps accumulate dirt over time, especially if it is not used. To maintain its peak performance, below are some of the best things to do:

  • Regularly check the pumps for damage, including dents and cracks. Fix the problem before it worsens.
  • Tighten all the connections. Use O-rings and other seals to secure the pump to a hose or pipe. This will prevent leaks.
  • Flush the water before using the pump after winterization or long-term storage. This will ensure a cleaner water supply to the outlets.
  • Use an in-line filter or strainer on the pump. It removes debris that can get in the water, especially if it is for drinking.


SEAFLO, Amarine Made, Jabsco, and West Marine fresh water pump are some of the top options. They are amongst the most reliable global brands with a diverse selection of water pumps that will surely suit your needs.

This will depend on the specific type of pump that you have. Most models have a switch that allows the pump to pressurize. As you open the faucet, the pump switches on, allowing water to run through the hose or pipe. It sustains the pressure to keep a steady flow rate. Once the spigot is closed, the pump turns off, inhibiting the movement of the water as well.

If the water pump has been off for a long time, it loses pressure and will not work accordingly. For the pump to work again, priming is a must. Here’s how you can do it:

  • Prepare the pump by turning off the power supply.
  • Inspect for any damage, which can compromise performance and safety.
  • Open the relief valve and check to see if there is any pressure.
  • Connect a hose to the pump.
  • Turn on the water supply until it reaches the tank.
  • Let the pump run for about a minute. If water does not flow smoothly, clean the pump and remove any blockage. Dirt and debris can accumulate over time, which will restrict water.

The first thing that you have to do is to remove the water in the tank. Add bleach, vinegar, or any other cleaner suitable for the material of the tank. Pour water and let the cleaning solution sit for at least 24 hours. Drain water from the tank and fill it with freshwater once it is clean.

Water is a necessity and not a luxury in boats. From dishwashing to showering to drinking, it is crucial to have access to water. The best marine freshwater pump will make such possible. It ensures the availability of water onboard while maintaining high pressure. The right pump transports freshwater from the source to the outlets in no time!

sailboat water pump

“I am James Harvey – founder of Boating Basics Online. It is established with the drive to help out first-time boaters, which are those desiring to explore their way through the water. So if you are new to boating, start from here with me. “

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08-01-2024, 17:55  
Boat: Hinckley Bermuda 40
. 40 foot sailboat carrying 100 gals freshwater; freshwater and flush. 14 gallon hot tank with T-5 Expansion tank and accumulator and 4GPM with 40 psi pressure switch. I want to dump the expansion tank/accumulator and just go with a variable speed pump...probably 4GPM or better. Any recommendations? Usually use 2.5 gals per day per person when cruising...liberal.
08-01-2024, 18:35  
Boat: 35 Ft. cutter, custom
Pretty subjective.
The "Groco Paragon Jr." for your size might be the "best" available.
The prices are shocking.
All pumps should have an accumulator tank, it kind of goes with the territory, (or flow,
08-01-2024, 18:41  
Boat: Building a Max Cruise 44 hybrid electric cat
pumps get my vote. But as Bowdrie says, the accumulator is still a good idea. - Youtube Vlog -
08-01-2024, 19:00  
Boat: Seawind 1000 XL
I tried one of the new units with a mechanical bypass. Its even better at keeping a constant flow and probably less to go bad.
09-01-2024, 03:32  
Boat: (Cruiser Living On Dirt)
I tried one of the new units with a mechanical bypass. Its even better at keeping a constant flow and probably less to go bad.
09-01-2024, 08:31  
Boat: Seawind 1000 XL
09-01-2024, 09:53  
Boat: Gulfstar 51
free needing adjustment only once a year or so if that. Perhaps you have a small pinhole leak in the air bladder or that is causing issues with your present setup. Good luck with problem. Your your choice.
09-01-2024, 10:03  
Boat: Morgan 382
freshwater pump that I bought from stock at the local WM. No accumulator (no room for it) and it works just fine. Even flow, no issues. Five years, most of it full time . I would replace with the same if I needed to.

Maybe the need for an accumulator comes form having a pump oversized for the pluming? I will never have more than one tap open, and sized the pump for that. If the pump were trying to flow 3 times what one tap will flow, than I could see it having a problem with cycling.
09-01-2024, 10:17  
Boat: Pearson 367, 36 Foot
09-01-2024, 10:23  
Boat: EuroCat 2000 71 ft
I changed both pumps to (in my case ) 240vac 'household ', pumps plus accumulator on each. , easily replaced or serviced and (8) years later -still going strong. Frankly , if the boat is working hard ,constant use , I will always look for a 'household ' substitute.e.g. frig , , dishwasher ,vac , machine and of course f/water pumps.
09-01-2024, 10:24  
Boat: Tartan 40
09-01-2024, 11:10  
Boat: 44' Custom Aluminum Cutter, & Pearson 30
09-01-2024, 11:44  
Boat: Pearson 367, 36 Foot
09-01-2024, 12:07  
Boat: Privilege 435
09-01-2024, 21:10  
Boat: 35 Ft. cutter, custom
flush. 14 gallon hot water tank with T-5 Expansion tank and accumulator and Jabsco 4GPM pump with 40 psi pressure switch. I want to dump the expansion tank/accumulator and just go with a variable speed pump...probably 4GPM or better. Any recommendations? Usually use 2.5 gals per day per person when cruising...liberal.
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Fresh Water Boat Systems

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About Fresh Water Boat Systems

Keeping your water fresh with a high quality boat systems.

Fresh Water Boat Systems is primarily for boats that have the capacity to store and move fresh water, usually for at a sink or shower in the cabin. In addition to the water pressure pumps required for a fresh water system, we offer things like water tanks and heaters, sinks, showers, pressure regulators, and chemical treatments. Brands such as Jabsco, Whale, Raritan, Flojet and Scandvik have put in the time and energy to make sure their products are of the highest quality, and designed to deal with a constantly wet environment.

Fresh Water Boat Systems How-Tos

How to install a shower pump on my boat.

After a hot day out sailing, racing, fishing, or simply relaxing on the deck, a boater always looks forward to a refreshing shower. Nothing beats the feeling of powerful water jets splashing on your body. However, due to structural and space limitations, it can be a bit challenging to get the right water pressure. This will particularly affect small watercrafts. In order to make certain the shower works just right, it is necessary to put in place a good boat shower pump. This device is charged with making sure there is a constant flow of water. It also helps in maintaining consistent water pressure thus offering you a "power shower."

Why is a shower pump needed in a boat?

As a boater, you may be asking if it's necessary to have a shower on a boat. Well, if you desire to get rid of the salt, dirt, smell or sweat from your body, then you need a shower and a water pump. Unlike a home, a boat will have a little area to hold the water. This simply means that you have to work with limited quantities. In addition, the water tanks will be located below the deck or on a slightly raised platform. Therefore, the pressure of water will be low. A pump increases the water pressure and also reduces wastage and keeps you clean.

Installing a Boat Shower Pump

  • Shower pump
  • Wood or Rubber slab
  • Power Drill
  • 15-mm Pipes
  • 25 Amp fuse
  • Screwdriver
  • Screws/Bolts


  • Identify a good spot on the boat. It should be kept as near as possible to the tanks storing water. It is always a good idea to position the pump at a point that is lower than the water tank base (bottom).
  • Position the pump on the wood or rubber piece and mark the holes. Do the same to the desired area on the boat.
  • Take the power drill and drill the holes on the slab as well as the boat.
  • Align the slab on the boat and place the pump horizontally on top of the slab.
  • Insert the screws or bolts and attach the nuts underneath. Tighten with a screwdriver or wrench.
  • Connect the pipe from the water tank to the inlet side of the filter. Another pipe should be connected from the filter's outlet to the inlet of the pump.
  • Connect another pipe from the pumps outlet to the shower. You may also place a filter between the pump and shower head.
  • Locate the pump's positive (red) wire and splice it to a positive power source in the fuse box. Place a 25 amp fuse while making sure power has been disconnected or switched off. Connect the other black (negative) wire to a negative point.

Tips to Choosing a Boat Shower Pump

Choosing the right shower pump comes with its fair of challenges. This is fueled by intense market rivalry, lack of knowledge, a wide range of products, and more.

The following tips will come handy when thinking of fitting a shower pump:

Frequency of Use: - If the shower only serves one or two people, or is used rarely, then a small or medium pump should be sufficient.

Pump Output: - The pumping pressure is usually between 1.0 to 4.5 bars. Too much pressure may affect power consumption and also other constituent parts such as the shower heads and pipes.

Energy efficiency: - A good pump should provide maximum pressure with minimal usage of power. It makes no sense to install a large and powerful pump if one or two people will be using it.

Brand Reputation: - Shower pumps come in varied designs, shapes and brands. Always go for a brand that is known to be durable, energy-efficient, cost-effective and easy to install.

Many boaters or boat owners have the notion that installing a shower pump in the boat is a laborious activity. In fact, some will choose to splash water on themselves while others will stick to the faulty shower. Well, this doesn't have to be the case. Replacing or installing a shower pump can be undertaken by any person with basic skills. No extensive knowledge on plumbing or wiring is required. The whole exercise may require only a few hours hence you can decide to set aside one sunny afternoon to carry out the boat shower pump installation. You can turn the activity into a pass time by asking a friend to assist. Before you install a pump, be sure to browse through our high quality pumps to ensure you get the best pump at a great price.

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SEAFLO 41 Series DC Diaphragm Pumps 12V/24V 3-17LPM 17-60PSI

The 41-Series pump provides high volume water flow with reduced pump cycling, thanks to the quad chamber diaphragm and internal bypass. These models are designed to run on water systems with no accumulator tank necessary, and up to five outlets. It is also suited for use with a holding tank water system, as may be found in a boat, RV or remote cabin. It provides up to 3.3 gallons per minute, suitable in a system of up to five fixtures. The 41-Series pumps are self-priming, and can run dry without damage, performance reliable and low current. This automatic demand water system pump has a built-in pressure switch, which automatically starts and stops the pump when faucet is opened and closed.?They're easy to install, service and winterize with quick?snap-in port fittings.

  • Specifications |


-Can supply up to 3 fixtures
-Quick connect fitting
-Self priming
-Run dry safe
-Can be use for Fresh&Salt Water
-16AWG,4.5"long Leads
-2 Year Warranty
- Meets or exceeds RoHS, SGS, and ISO standards


Marine,RV,Agricutural Spraying,General Industial,Filtration,Beverage Processing,Solar Water System.

Type 4 Chamber positive displacement diaphragm pump, self priming, capable of being run dry
Control Type Pressure switch & By pass control
Max Recommended Temperature 60° C(140° F)
Priming Capabilities 6 feet (1.8 m) suction lift
Re-start Pressure

Shut-off Pressure 17 PSI :9 PSI ± 5 PSI(± 0.3 bar)

Shut-off Pressure 35 PSI :25 PSI ± 5 PSI(± 0.3 bar)

Inlet/Outlet Ports QUICK ATTACH
Weight 3.9 lbs (1.8 kg)
Leads 16 AWG, 11" (28 cm) long with 2-Pin connector / Leads
Duty Cycle Intermittent
Max.Amp Draw 8.0 A
Fuse 12.0 A




SFDP1-027-017-41 12V 2.7 / 10.0 switch & By pass 4.5 A 17 / 1.2 EPDM Santoprene QUICK ATTACH 2-Pin/Leads
SFDP2-027-017-41 24V 2.7 / 10.0 switch & By pass 2.0 A 17 / 1.2 EPDM Santoprene QUICK ATTACH 2-Pin/Leads
SFDP1-033-035-41 12V 3.3 / 12.5 switch & By pass 8.0 A 35 / 2.4 EPDM Santoprene QUICK ATTACH 2-Pin/Leads
SFDP2-033-035-41 24V 3.3 / 12.5 switch & By pass 4.0 A 35 / 2.4 EPDM Santoprene QUICK ATTACH 2-Pin/Leads
SFDPA1-033-035-41 115V 3.3 / 12.5 Demand & By pass 1.25 A 35 / 2.4 EPDM Santoprene QUICK ATTACH Leads/Plug
SFDPA2-033-035-41 220V 3.3 / 12.5 Demand & By pass 0.55 A 35 / 2.4 EPDM Santoprene QUICK ATTACH Leads/Plug

Consult factory for other available models.



0 0 2.75 10.40 2.58
8 0.55 2.27 8.60 3.74
12 0.83 2.17 8.20 4
16 1.10 2.01 7.60 4.37
17 1.17 0 0 4.43

View other parameter tables / graphs, Please click here

Key Description Quantity
A Pump Head Assembly 1
B Valve Assembly 1
C Diaphragm Assembly 1
D Motor Assembly 1
1 Pressure switch 1
2 Diaphragm of Pressure Switch 1
3 Pump Head 1
4 Quick Attach Clip 2
5 Diaphragm 1
6 Rubber Feet 2
7 Motor 1


Unit Pump Weight

4.81 lbs (2.18 kg)

Selling Unit Size (L x W x H)

13.78" x 5.19" x 4.33 "
(35 x 13 x 11 cm)

Selling Unit Weight

4.98 lbs (2.26 kg)

Master Carton Size (L x W x H)

26.38" x 12.8" x 10.04"
(67 x 32.5 x 25.5 cm)

Master Carton Qty

10 pcs

Master Carton Weight

52.04 lbs (23.6 kg)

  • Standard Accessories
  • Optional Accessories

41F001 Fitting - 3/4 QA x 1/2 Barb

41F003 Fitting - 3/4 QA x 1/2 Barb

41F004 Fitting - 3/4 QA x 1/2 MNPT

41S03 Filter - 3/4 QA

41F002 Fitting - 3/4 QA x 1/2 MNPT

41F005 Fitting - 3/4 QA x 1/2

52S01 Filter - 3/4 QA

SEAFLO 42 Series Diaphragm Pump 12V/24...

SEAFLO 33 Series DC Diaphragm Pump 12V...

SEAFLO 34 Series DC Diaphragm Pump 12/...

SEAFLO 31 Series DC Diaphragm Pump 12V...

55 Series Automatic Demand Diaphragm P...

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  • SEAFLO 21 Series DC Diaphragm Pump 12V/24V 2.0-4.3LPM 17-80PSI
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  • SEAFLO 33 Series DC Diaphragm Pump 12V/24V 3.0-13.2LPM 17-60PSI
  • SEAFLO 01 Series 1100GPH Seaflo Bilge Pump
  • SEAFLO 41 Series Diaphragm Pumps 12V/24V 3-17LPM 17-60PSI

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What is the quietest fresh water pump?

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Hi I have an older Shurflo diaphragm water pump that is pretty noisy. Which pumps do you find least noisy? Can the pump be enclosed into something to make less noise? I read somewhere that the reason for the noise may be due to over-tightening the mounting screws/bolts. My pump is hooked onto accumulator/bladder tank but the pressure does not last very long and pump starts after few seconds of water running on the tap. I am not too fussy about the accumulator/bladder tank so if a quieter pump is available without the need for automatic shut off I'd go for it. What others use?  

sailboat water pump

Sounds like you need to get a bicycle pump and reinflate the bladder.. if the pump's coming on more than every 3 or 4 tap openings (exc for filling a sink, etc) then the bladder pressure is too low. It should say on the tank what the pressure should be.. they make some nice compact bicycle pumps with built in gauges nowadays.. All these pumps make noise.. no reason why you can't mask the noise with an insulated enclosure, but a properly setup accumulator really quiets things down since the pump runs far less often.  

sailboat water pump

Or this Whale Marine - Products I agree with Faster, if your pump is coming on that often the bladder isn't working properly. Most of the noise from a Shurflo is vibration from whatever it's mounted to, try to isolate the pump and allow the rubber feet to absorb the motion.  

I want to hear the pump, so I know if it running when it shouldn't be.  

shur flo makes noisey and quiet pumps. i was fortunate that this bot came with a quiet one. i lived on a boat with a noisey pump long ago--only good thing about noisey pump is that you know when you leave it on.... and if your pump is always making a few bumps, try seeking the leaks--could be a hose clamp, could be a pinhole in a hose..could be anything..if the water comes on and doesnt flow nicely, there could be a nice lil air bubble in your pump....i had one of those after running the tank out of water...didnt prime it correctly and had a nice fat air bubble..fixed it and perfection.  

If noise if coming from mounting ,try mounting pump on a separate panel and rubber mount that .  

sailboat water pump

Actually, you can mount the pump on two lengths of 2" (non-wire reinforced) hose with the ends cut off on the diagonal and screwed/bolted to the sole. The flexibility of the hose will substantially reduce the "pounding" noise of the pump. One just needs ensure that the waterlines have enough slack on either side of the pump to flex without damage to the connections. In addition to checking the accumulator bladder, you might also check to ensure that your pressure switch is operating properly and not activating for an unnecessarily high pressure. FWIW...  

sailboat water pump

I'd rather hear the thump than find 100 gallons of water consumed by a child brushing his/her teeth.  

Ah... Try turning off the pump and getting folks to rely upon a hand/foot pump at the galley sink when the yacht's away from the dock except when showering (navy showers) or rinsing dishes after washing. One (or one's child) takes a glass of water to the head to brush one's teeth, for example. (We did this with our daughter when she was small and, after we returned from an extended trip, the first morning home she walked into the kitchen, got a glass from the cupboard, filled it with water at the kitchen sink and headed for her bathroom. "Where ya going with that?" I asked. "To brush my teeth Daddy" she replied. I just smiled, "Good for You honeybee!") Those were the daze...  

sailboat water pump

It may just be the age of the pump. I replaced ours last year when the old one died and couldn't believe how much quieter it was.  

The quitest pump i have seen is the new variable speed pumps. They are made by a few companies Sure Flow, Jabsco and probably others. Pretty spendy but when you see how well they work you will be happy. JABSCO V-Flo Variable Speed Pump 5.0 at West Marine Mitch  

sailboat water pump

I had a headhunter pump in my fishing boat. It is variable speed and extremely quiet...extremely expensive too. X-Caliber - 12-24 DC Headhunter, Inc  

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Wholesale Marine

Water Pumps & Impellers

sailboat water pump

Boat Impellers and Water Pumps

No matter the type of engine your boat has, outboard, inboard, stern drive, I/O, or V-Drive, a water pump is likely being used to keep the engine, radiator, and exhaust running cool. Unlike a car that uses antifreeze, a boat engine uses water to cool the engine directly from the body of water it is in by using boat water pumps. This constant use can, over time, wear out water pumps and specifically its impeller component, causing them to crack. Boat impellers are often rubber with vanes to draw water to the engine. Prolonged exposure to heat can wear out the rubber, causing damage to the impeller. Many manufacturers state that they will last up to three years, Wholesale Marine recommends having the boat water pump impeller replaced as part of your yearly maintenance . This inexpensive repair can save thousands of dollars over replacing a seized engine if your boat impeller breaks and your engine overheats.

Browse Our Selection of Boat Impellers and Water Pumps!

Keeping your craft running smoothly is Wholesale Marine’s mission. We carry everything you need. Our extensive inventory of boat water pumps, boat impellers will fit all major engine manufacturers including Chris-Craft, Chrysler, Crusader Engines, Evinrude, Force Outboards, Honda Marine, Johnson, MerCruiser, Mercury, Mariner Outboards, OMC, PleasureCraft Engine Group, Suzuki, Tohatsu Outboards, Volvo Penta, and Yamaha. If you are looking for an impeller kit, shop Sierra. You can speak to your knowledgeable staff to make certain you’re buying the part you need.

When you need a new water pump or the time has come to replace the boat impeller, Wholesale Marine has you covered. Keeping your vessel well-maintained and ready for your next voyage is easy at Wholesale Marine. Once you become a customer, our selection, experience, exceptional customer service, and low price guarantee will keep you coming back. Call us at 877-388-2628 for any of your boat needs. Same day, flat-rate shipping is available. Be sure to ask about our Captain’s Club Rewards Program   for additional discounts every time you shop at Wholesale Marine.

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  1. Freshwater Pumps

    At the heart of freshwater systems aboard boats are 12V pumps. Sometimes they're 24V, but that generally means you have a boat big enough to have paid help to worry about mundane things like water. ... 2002, for a review of manual (and pedal) pumps. Whale's Gusher Mark III pedal pump, for example, throws lots of water—at 0 amps. Value ...

  2. Pressurized Freshwater Systems Guide

    Higher capacity pumps will have port sizes of 3/4" or 1" to allow more flow. Some shower pumps offer multiple port sizes between 3/4" and 1 1/2". Otherwise 1/2" NPT ports are very common on freshwater pumps. West Marine Freshwater System Pump is designed to meet the needs of most boats with a water heater, shower and up to three faucets.

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  4. 12 Best Marine Freshwater Pumps for Your Boat, RV or Camper

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  5. Best fresh water pump

    Looking for recs on a new freshwater pump . 40 foot sailboat carrying 100 gals freshwater; freshwater shower and toilet flush. 14 gallon hot water tank with T-5 ... washing machine and of course f/water pumps. 09-01-2024, 10:24 #11: malbert73. Registered User . Join Date: Jun 2008. Boat: Tartan 40. Posts: 2,480 Re: Best fresh water pump. Quote: ...

  6. Marine Fresh Water Pumps & Replacement Parts

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  7. Marine and Boat Fresh Water Pumps Systems

    Boat water pumps feature inline strainers and quiet operation that moves up to 11 gallons per hour. Self-priming marine water pumps boast compact designs for tight places and industrial-grade pumps for boats up to 50 feet. Boats must have high-quality freshwater pumps to guarantee they have access to clean water when on the water.

  8. Boat Water Pumps & Systems

    If you're looking for advice about boat water pumps, or anything else for your boat, give us a call at (877) 388-2628. We're here from 9:00 AM until 6:00 PM, EST, Monday through Friday. Wholesale Marine's boat water pumps and systems keep sanitation systems running smoothly. View our line of boat water pumps from top manufacturers.

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    A freshwater flush kit-highly-desirable in any installation-is a $125 option. The 12-volt booster pump, drawing 1 amp, is a $120 option. An extensive cruising kit, including 12 pre-filters, rebuild parts for the high-pressure pump, cleaner, preservative, and other spares, costs $330. SKs pricing is very competitive.

  10. Marine Pumps

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    Whale photo. Remove the fresh water supply hose from the hand pump to see if water is flowing from it. If water flow is not present you can try moving the hose end to a lower point in the boat or simply try sucking on it like a straw. If there's good water flow, then your hand pump likely needs a rebuild.

  12. Fresh Water Boat System Pumps & Accessories

    Fresh Water Boat Systems is primarily for boats that have the capacity to store and move fresh water, usually for at a sink or shower in the cabin. In addition to the water pressure pumps required for a fresh water system, we offer things like water tanks and heaters, sinks, showers, pressure regulators, and chemical treatments.

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    What are Marine Pumps? There are quite a few applications for marine water pumps on board a boat, including; draining the bilge, filling live wells, and powering wash downs. Making sure your pumps are working and well maintained is important to a safe and successful day of fishing or cruising. Marine pumps can go through a lot of strain over ...

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  18. SEAFLO Boat Water Pumps

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  20. What is the quietest fresh water pump?

    1. 156680. 2736 posts · Joined 2008. #6 · Feb 24, 2013 (Edited) shur flo makes noisey and quiet pumps. i was fortunate that this bot came with a quiet one. i lived on a boat with a noisey pump long ago--only good thing about noisey pump is that you know when you leave it on.... and if your pump is always making a few bumps, try seeking the ...

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