RV Water Pump Problems : An Overview

Rv water pump problems can cause low water pressure or complete failure and can be caused by various factors such as airlock, clogged filters, or a malfunctioning pump. As an rv owner, there are few things more frustrating than experiencing water pump problems while out on the road. Whether it’s low water pressure or a complete pump failure, it can put a damper on your trip and make your rv lifestyle less enjoyable. Water pump issues can be caused by various factors such as airlock, clogged filters, or a malfunctioning pump.

In this article, we’ll explore some common rv water pump problems and discuss how to troubleshoot and fix them so you can get back to enjoying your travels.

Understanding The Basics Of Rv Water Pump

Rvs are a fantastic way to travel, and they offer the freedom to explore the world at your leisure. One of the essential components of an rv is the water system, which allows for showering, cooking, and cleaning. However, problems with your rv’s water pump can spell disaster, making it impossible to access the water you need.

In this blog post, we’ll explore the basics of rv water pumps to help you understand how they work, the different types available, and why they occasionally fail.

What Is An Rv Water Pump?

An rv water pump is a component of your rv’s water system that facilitates the flow of water from your freshwater holding tank to your rv’s faucets, shower, and toilet. Rv water pumps utilize a motor to pressurize the water from the water tank, allowing it to flow through pipes and out of your rv’s fixtures.

How Does An Rv Water Pump Work?

An rv water pump works by pressurizing the water stored in your rv’s water tank and distributing it to various fixtures throughout the vehicle. The motor in the rv water pump pulls water out of the tank and sends it through the pipes to your sinks, showers, and toilets.

When you turn on a faucet, it opens a valve, allowing pressurized water to flow out. Once you turn the faucet off, the valve closes, and the pump stops running.

What Are The Types Of Rv Water Pumps?

There are two primary types of rv water pumps: demand pumps and constant pumps.

  • Demand pumps are the most common type of rv water pump. They turn on automatically when they sense a drop in water pressure and turn off once the pressure is restored.
  • Constant pumps, on the other hand, are always running, meaning they maintain a constant water pressure within your rv. However, this can lead to increased power consumption and a shorter lifespan.

Why Do Rv Water Pumps Fail?

Rv water pumps can fail for several reasons, including:

  • Rust or corrosion buildup can damage the internal components of the pump.
  • A worn or damaged diaphragm inside the pump can lead to diminished water pressure or a complete loss of pressure.
  • Running the rv pump when the freshwater tank is empty can cause significant damage to the pump.
  • If debris or sediment gets into the pump, it can damage the motor, valve, or other components.

Understanding the basics of your rv water pump is essential to ensuring proper operation and identifying potential issues early on. There are various types of water pumps to choose from, each with its own set of advantages and disadvantages. By keeping your water pump well-maintained and aware of common problems, you can enjoy a hassle-free experience on your next rv adventure.

Common Rv Water Pump Problems

An rv’s water pump is essential for delivering water to the rv’s faucets, shower, and toilet. However, just like any other device, it can break down, leading to water pump problems.

Low Water Pressure

If you notice a decrease in your rv’s water pressure, it could indicate a potential problem with your water pump.

  • Dirty or clogged filters or screens
  • A damaged or old water pump
  • An empty water tank
  • A punctured or blocked water line

Air Bubbles In The Water

Several issues could cause air bubbles to appear in your rv’s water system.

  • A faulty water pump impeller
  • A loose suction line leading to your water pump
  • A punctured or blocked water line
  • A damaged water pump housing

Continuous Cycling

If your rv’s water pump is turning on and off continuously as you use the water, it could be a sign of a potential problem.

  • A leak in the water system
  • A blocked water line filter
  • An issue with your water pressure switch

Loud/Strange Sounds

If you hear weird sounds coming from your rv’s water pump, it may indicate an underlying problem.

  • Loose or damaged water pump fittings
  • A loose water pump belt
  • A damaged water pump impeller
  • Inadequate lubrication of the water pump mechanism


Leaks in your rv’s water system are never a good sign and could indicate an underlying issue with the water pump.

  • Cracked or damaged water pump housing
  • Loose water line fittings
  • Damaged water pump impeller

Failure To Shut Off

If your rv’s water pump fails to switch off, even when the water has stopped flowing, it could be a result of the following:

  • A malfunctioning water pressure switch
  • A blocked or clogged water line
  • A damaged water pump mechanism

That’s a wrap on common rv water pump problems. Remember, always before setting out on a trip, make sure your rv’s water system is in good working order.

Diagnosing Rv Water Pump Issues

Rvs are a great way to explore different destinations while enjoying the comforts of home. However, when your water pump fails, it can quickly ruin your trip. Diagnosing rv water pump problems is an essential skill that every rv owner should have.

In this article, we’ll discuss how to inspect your rv water pump and system, check the electrical connections, identify potential blockages, test water pressure, and replace the water pump.

Inspecting The Water Pump And System

The first step in diagnosing rv water pump issues is to inspect the water pump and system.

  • Check the pump for any damage or leaks.
  • Inspect the surrounding area for any signs of water damage or dampness.
  • Ensure that the water tank is full and the rv is level.
  • Check the water filter for any clogs or contaminants.

Checking Electrical Connections

One of the most common issues with rv water pumps is an electrical problem.

  • Ensure that the rv is disconnected from the power source.
  • Check the battery terminals for any corrosion
  • Test the voltage of the battery using a multimeter.
  • Check the fuses and breakers for any faults.

Identifying Potential Blockages

Blockages can cause low water flow or no flow at all.

  • Check the water intake for any debris or contaminants.
  • Inspect the water lines for any kinks or blockages.
  • Check the valve to ensure it’s open and free of debris.
  • Check for any air in the system.

Testing Water Pressure

Testing the water pressure can help identify problems with the pump or system.

  • Turn off all other water sources in the rv.
  • Turn on the water pump and allow it to reach full pressure.
  • Use a pressure gauge to measure the water pressure at the nearest faucet.
  • If the pressure is low, it may indicate a problem with the pump or system.

Replacing The Water Pump

If all other diagnostic methods fail, it may be time to replace the water pump.

  • Choose a replacement pump that matches the old pump’s specifications.
  • Follow the manufacturer’s instructions carefully.
  • Ensure that all connections are tight and secure.
  • Test the new pump for proper function.

Diagnosing rv water pump problems may sound daunting at first, but with a few simple steps, anyone can do it. By following our guide, you can save time, money, and avoid any unnecessary frustrations on your next rv adventure.

Tips For Preventing Rv Water Pump Problems

Rv water pumps are essential for accessing clean water when traveling in an rv. However, any problems with these pumps can cause significant issues, making it essential to properly maintain and care for them.

Proper Winterization Techniques

Winterizing your rv correctly helps protect your water pump from damage during cold weather.

  • Drain and flush the water system
  • Disconnect the water pump
  • Blow out the water lines
  • Use antifreeze to protect the water system

Replacing Old/Cracked Pipes

Old and cracked pipes may cause damage to your rv water pump. Finding these issues beforehand and replacing any damaged pipes is a crucial aspect of ensuring that your water pump functions correctly.

Make sure to check for any pipes that need to be replaced before starting your journey.

Maintaining The Rv Water System

Your rv water system needs consistent maintenance to operate at peak performance.

  • Regularly sanitize the water system
  • Keep track of water usage to avoid overloading the pump
  • Inspect the system before each trip
  • Replace filters regularly

Storing The Rv Properly

Storing your rv correctly can protect the water pump from various problems, including corrosion and damage.

Here are some tips for storing your rv properly:

  • Drain all water from your rv
  • Keep the rv covered
  • Use a battery tender to keep the battery charged during storage
  • Place rv on jacks

By following these tips, you can prevent rv water pump problems and have a comfortable journey without any disruptions.

Frequently Asked Questions For Rv Water Pump Problems

How Can I Tell If My Rv Water Pump Is Failing?

If your rv water pump is failing, you may notice a decrease in water pressure, unusual noises, or water that is not flowing properly. Check for any visible leaks or damage to the pump and its connections, and consider replacing the pump if it is old or frequently used.

What Are Some Common Reasons Why An Rv Water Pump Would Stop Working?

Rv water pumps can stop working due to a blown fuse, low battery, clogged filter, and internal damage. When a pump doesn’t receive power, it won’t work. A bad battery won’t keep the pump running. A clogged filter can make the water flow difficult, and any damage causes failure.

Can I Fix My Rv Water Pump Myself Or Do I Need To Take It To A Professional?

It’s possible to fix your rv water pump yourself, but it depends on your level of expertise. Small issues like clogs or air pockets can be resolved with simple solutions, but if there are major problems like leaks or damage, it’s best to take it to a professional.

Always prioritize safety and consult the manual before attempting any repairs.

What Should I Do If My Rv Water Pump Is Making Loud Noises Or Continuously Running?

If your rv water pump is making loud noises or continuously running, the first thing you should do is turn off the water supply and check for any leaks or clogs. If there are none, it may be a problem with the pump itself and a professional should be contacted to inspect and repair it.


Now that you have a better understanding of rv water pump problems, take the necessary steps to maintain your water pump. Keeping your water pump in good condition is vital to ensure a smooth and comfortable trip. Make sure to keep an eye out for leaks, troubleshoot any issues with the pressure switch, and clean the system regularly.

Don’t forget to check the wiring and fuses as well. By remaining vigilant and proactive in your water pump maintenance, you can avoid costly repairs and enjoy uninterrupted water supply on your rv trips. Taking care of your rv’s water pump not only ensures the comfort and convenience of your travels but also prolongs the life of your rv’s plumbing system.

So, grab your toolkit, and keep your water pump in tip-top shape. Happy rving!

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