5 Best 12 Volt Water Pump for RV [In 2025]

When it comes to maintaining the water system in your RV, a reliable and efficient 12-volt water pump is essential. Whether you’re looking to improve water pressure, handle your daily hygiene needs, or power your outdoor cleaning tasks, the right 12-volt water pump can make all the difference. In this comprehensive review, we’ll explore the top 12-volt water pump options on the market, helping you make an informed decision for your RV.

5 Best 12 Volt Water Pump for RV Reviews

WASSERMANN RV Pump, 12V Self-priming RV Water Pressure Pump

Overview

The WASSERMANN RV Pump is a 12V self-priming water pressure pump designed for use in RVs, marine applications, and other outdoor settings. It boasts a strong output of up to 4 GPM (gallons per minute) and a pressure setting of 45 PSI (pounds per square inch).

Specs

• Flow Rate: 4 GPM
• Pressure: 45 PSI
• Voltage: 12V DC
• Amperage: 4.6A
• Inlet/Outlet: 1/2-inch

Pros

• Provides strong water pressure and flow rate
• Automatic on/off operation with pressure switch
• Corrosion-resistant and allows for dry running
• Easy to install with included adaptors

Cons

• Durability and lifespan concerns, with some units failing after a few months
• Noise level can be an issue, with some customers reporting a “jackhammer” sound
• Pressure and performance may not meet the needs of all RV owners

Customer Reviews

Customers find the WASSERMANN RV Pump to be functional, especially when dealing with pressure drops. They appreciate its ease of installation and value for money. However, the pump’s quality, noise level, and durability receive mixed feedback, with some customers reporting issues with the pressure switch and overall lifespan of the unit.

SEAFLO 55-Series Diaphragm Pump

Overview

The SEAFLO 55-Series Diaphragm Pump is a high-performance 12V DC water pump designed for RV, marine, and off-grid water systems. It boasts a powerful 5.5 GPM flow rate and a 60 PSI shut-off pressure, making it a versatile choice for a wide range of applications.

Specs

• Flow Rate: 5.5 GPM
• Pressure: 60 PSI
• Voltage: 12V DC
• Amperage: 17A
• Inlet/Outlet: 1/2-inch MNPT threaded

Pros

• High flow rate and robust suction power for versatile applications
• Durable construction with corrosion-resistant materials
• Quiet operation and reduced cycling for a smooth water flow
• Self-priming capability with up to 9 feet of suction lift
• Adjustable pressure switch for customized performance

Cons

• Build quality concerns, with some units failing within a week of use
• Pressure switch issues, leading to unexpected shutoffs and continuous leaks
• Motor life concerns, with some pumps dying completely within a few hours

Customer Reviews

Customers appreciate the SEAFLO 55-Series Diaphragm Pump’s quiet operation and easy installation, but the build quality and durability issues are a significant concern. Some customers report problems with the pressure switch and motor, leading to unreliable performance and unexpected failures.

SEAFLO 33-Series Water Pump and Accumulator Tank System

Overview

The SEAFLO 33-Series Water Pump and Accumulator Tank System is a 12V DC water pressure system designed to reduce pump cycling and provide consistent water pressure. The system includes a 3.0 GPM pump and a 0.2-gallon accumulator tank for enhanced performance and longevity.

Specs

• Flow Rate: 3.0 GPM
• Pressure: 45 PSI
• Voltage: 12V DC
• Amperage: 8.0A
• Inlet/Outlet: 1/2-inch MNPT
• Accumulator Tank Capacity: 0.2 gallons

Pros

• Quiet operation thanks to the accumulator tank
• Consistent water pressure and reduced pump cycling
• Durable construction with corrosion-resistant materials
• Easy installation with pre-assembled components
• Suitable for potable water applications

Cons

• Mixed feedback on the accumulator tank, with some customers reporting missing items

Customer Reviews

Customers are impressed with the SEAFLO 33-Series Water Pump and Accumulator Tank System, praising its quiet operation, consistent water pressure, and good flow rate. They consider it a great value for the money and appreciate the easy installation process. However, a few customers have reported issues with the accumulator tank.

5.0 GPM 12V DC 55 PSI Revolution Water Pump

Overview

The Revolution Water Pump is a 12V DC water pump offering a 5.0 GPM flow rate and a 55 PSI pressure rating. It’s designed for a wide range of applications, including RVs, campers, boats, and more.

Specs

• Flow Rate: 5.0 GPM
• Pressure: 55 PSI
• Voltage: 12V DC
• Inlet/Outlet: 1/2-inch Thread

Pros

• Powerful water flow and pressure for various applications
• Quiet operation and smooth performance
• Easy installation as a direct replacement
• Good value for the price

Cons

• None reported by customers

Customer Reviews

Customers are generally pleased with the Revolution Water Pump, praising its ability to hold pressure, quiet operation, and easy installation. They consider it a reliable and capable replacement for their RV water systems.

Buying Guide: Choosing the Best 12 Volt Water Pump for Your RV

Flow Rate and Pressure

• Consider the required flow rate (GPM) and pressure (PSI) for your RV’s water system needs, such as showers, sinks, and outdoor cleaning tasks.
• Choose a pump that can provide sufficient water flow and pressure to meet your usage requirements.

Voltage and Amperage

• Ensure the pump is compatible with your RV’s 12V DC electrical system.
• Check the maximum amperage draw to ensure your RV’s electrical system can handle the pump’s power needs.

Durability and Reliability

• Look for pumps with durable construction, corrosion-resistant materials, and a proven track record of reliable performance.
• Consider the pump’s warranty and customer feedback to gauge its long-term durability.

Noise and Vibration

• Choose a pump that operates quietly, with minimal noise and vibration, to ensure a peaceful environment in your RV.
• Some pumps come with features like rubber mounting bases to reduce noise and vibration.

Installation and Compatibility

• Ensure the pump’s dimensions, inlet/outlet fittings, and mounting options are compatible with your RV’s water system.
• Look for pumps with clear installation instructions and easy-to-use components to simplify the installation process.

FAQ

1. What is the difference between a 12V and a 115V water pump?

The primary difference between a 12V and a 115V water pump is the power source. A 12V pump is designed to be powered by a 12-volt DC electrical system, typically found in RVs, boats, and other mobile applications. A 115V pump, on the other hand, is meant to be connected to a standard 115-volt AC household electrical outlet.

2. Do I need an accumulator tank with my 12V water pump?

An accumulator tank is not strictly necessary for a 12V water pump, but it can provide several benefits. The tank helps to smooth out the water pressure and reduce pump cycling, leading to quieter operation and longer pump life. If you’re experiencing pressure fluctuations or rapid cycling with your 12V pump, an accumulator tank may be a worthwhile investment.

3. How do I maintain my 12V water pump?

Proper maintenance of your 12V water pump involves regularly cleaning the inlet strainer, checking for any leaks or damage, and ensuring the pump is properly installed and secured. It’s also a good idea to run the pump periodically, even if you’re not using the water system, to keep the internal components lubricated and in good working order.

4. Can I run my 12V water pump dry?

Many 12V water pumps are designed with the capability to run dry for short periods of time without causing damage. However, it’s generally best to avoid running the pump dry whenever possible, as this can reduce the pump’s lifespan. If you suspect the pump is running dry, it’s a good idea to shut it off and check the water supply before resuming operation.

5. How do I choose the right size 12V water pump for my RV?

The size of the 12V water pump you’ll need for your RV depends on several factors, including the number of fixtures, the required flow rate, and the desired water pressure. As a general rule, a 4-5 GPM pump is suitable for most RV water systems. However, it’s best to consult with the manufacturer or an RV specialist to ensure you select the right pump for your specific needs.

Conclusion

Choosing the best 12-volt water pump for your RV is a crucial decision that can significantly impact the performance and reliability of your water system. By considering factors like flow rate, pressure, durability, and noise levels, you can find the right pump to meet your RV’s unique requirements. The products reviewed in this guide represent some of the top options on the market, each with its own set of strengths and potential drawbacks. Carefully evaluating your needs and reading customer feedback can help you make an informed decision and ensure a smooth and enjoyable RV experience.