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Tips for RV LP System Maintenance and Troubleshooting

RV's LP system ensures the smooth operation of appliances in the RV that run on propane. Read on for some helpful RV LP system maintenance tips.

 rv lp gas system

For RV enthusiasts, the LP system is an integral part of the overall camping experience. It provides fuel for cooking, heating, and running appliances in your motorhome, making it a crucial component of your recreational vehicle. As with any other part of your RV, regular maintenance of the LP system is essential to ensure optimal performance and safety.

If you are drawing a blank on how to maintain and monitor your RV’s LP system, don’t break a sweat! We’ve got your back like always. Check out our ten essential tips for maintaining your RV's LP system below. They will help you to identify potential issues and prevent any major problems down the road. By following these tips, you can ensure that your RV's LP system remains in excellent condition, providing you with a reliable and safe camping experience!

Understanding Your RV LP System

Before diving into maintenance tips for your RV's LP system, it's crucial to have a solid understanding of the system's basic components and functions. At its core, your RV's LP system is responsible for providing fuel to power appliances and other functions in your vehicle. RV LP system is also known as RV propane system or LP gas system for RV. This system typically consists of a propane tank, piping, and fittings that connect to appliances like stoves, fridges, ovens, and water heaters.

Here is an RV propane system diagram to help you visualize the basics of an RV LP system.

RV propane system diagram
Courtesy: etrailer

The propane tank is usually mounted on the exterior of the RV and can range in size from ten to a hundred pounds. Inside the RV, the propane lines run to various appliances, where the propane is burned to provide heat and power. The LP system is a closed system, which means that if it's working correctly, no gas should escape into your RV. However, if there is a leak, propane gas can build up and potentially ignite or cause an explosion. Because the RV LP system operates under high pressure and propane is a flammable gas, proper maintenance, and care are critical to ensure RV safety.

RV propane tanks basics

Tips for RV LP System Maintenance

A propane monitoring system for RV ensures all your propane-run appliances keep working smoothly. Here are some tips to help you maintain your RV LP system efficiently.

Don’t Paint the LP Cylinder

Painting your LP cylinder can pose several safety concerns. Any coating, including paint, on your cylinder can conceal visual cues that could indicate damage or wear on the cylinder's surface. These could include dents, corrosion, or rust, all of which could weaken the cylinder's structure and make it more vulnerable to failure. Not only that, the heat generated during the painting process can be dangerous for propane cylinders. The cylinders are designed to withstand a specific amount of heat, but excessive heat can weaken the metal and compromise the cylinder's integrity. Painting a propane cylinder could generate enough heat to cause damage, leading to potential safety hazards.

Inspect the LP Cylinder for Damages

Before setting out, make sure to inspect the cylinder for rust, corrosion, wear, and dents. That is because rust and corrosion can eat away at the cylinder's metal, leading to holes or cracks that can cause leaks. If left unchecked, they can cause the cylinder to fail or become unsafe to use. Cylinders are also made to withstand only a certain amount of pressure, and any damage or wear to the cylinder’s structure can prove dangerous. Rust and corrosion are common in areas with high humidity, saltwater exposure, or other harsh conditions, so if you are RV camping in places with these conditions, you are going to have to keep a closer eye on your LP cylinder.

Pay Attention to the Date on the LP Cylinder

Propane cylinders have a limited service life. Over time, the cylinders can deteriorate, and using an expired cylinder can be dangerous. That is why it's important to know the lifespan and expiry date of your cylinder. Each LP cylinder is stamped with a manufacturing date that is an indicator of when the cylinder was made, its age, and potential service life. The date is typically stamped or engraved on the cylinder's collar or foot ring. When it comes to the service life of propane cylinders, it can vary depending on their construction, intended use, and other factors. For example, some cylinders may have a service life of ten years, while others may be rated for 12, 15, or even 20 years. After the expiration of the cylinder's service life, it must be taken out of service and either recycled or properly disposed of.

Monitor the LP Gas Regulator

The LP gas regulator is responsible for controlling the propane pressure and reducing it from the high pressure in the propane tank to a lower pressure suitable for the appliances in your RV. It's important to ensure that the regulator is functioning correctly to prevent dangerous situations such as gas leaks or appliance damage due to incorrect pressure. Here are a few tips to keep in mind for your LP gas regulator maintenance:

  • Regular inspection: inspect the regulator regularly for any signs of wear, damage, or corrosion. Look for any cracks, dents, or discoloration. Check the regulator's connections to make sure they are secure and free from leaks.

  • Keep the vent clear: the regulator has a vent that needs to be clear of any debris or obstructions. Check the vent periodically and make sure it's not blocked. A blocked vent can cause the regulator to malfunction and potentially lead to a gas leak.

  • Test the regulator: periodically test the regulator using a manometer or gas pressure gauge to ensure it's regulating the propane pressure correctly. If the pressure is not within the recommended range, adjust the regulator or replace it if necessary.

  • Replace the regulator: the manufacturer's recommendation for LP gas regulator replacement varies, but it's generally recommended to replace the regulator every ten years or sooner if there are any signs of wear or damage.

Check the LP Gas Pressure

The LP gas pressure is the amount of pressure at which the propane flows from the cylinder to the appliances. The pressure must be within the recommended range for safe and efficient operation. That’s why you should check it at least once a year for routine maintenance, and more particularly after a system repair, or before you are heading out for camping season, or if you have set up a new propane system. You'll need a manometer or gas pressure gauge to check the pressure, and the procedure can vary according to your LP system and appliances. However, we have listed down the basic steps you can follow to check the gas pressure:

  1. Turn off all LP gas appliances and make sure the propane tank valve is fully open.

  2. Attach the manometer or gas pressure gauge to the low-pressure side of the regulator, which is usually located near the propane tank.

  3. Open one LP gas appliance, such as the stove or oven, and let it run for a few minutes to ensure a steady flow of propane.

  4. Check the manometer or gas pressure gauge reading and compare it to the recommended pressure range listed in your RV owner's manual or on the appliance's data plate.

  5. If the pressure is too high or too low, adjust the regulator's pressure setting according to the manufacturer's instructions until it's within the recommended range.

  6. Repeat the process for all LP gas appliances to ensure they're receiving the correct gas pressure.

Keep the LP Gas Tank Clean

A clean LP gas tank is an important part of RV maintenance. It can help ensure the safety, efficiency, and longevity of your LP gas system. A clean tank reduces the risk of leaks and helps ensure that the LP gas system operates safely because LP gas is highly flammable and can pose a serious safety hazard if it leaks or is not handled properly. Here are a few ways you can maintain a clean LP gas tank:

  • Store the tank properly: when the tank is not in use, store it in a dry, well-ventilated area away from direct sunlight and other sources of heat. This will prevent rust and other damage to the tank.

  • Check for leaks: regularly check the tank for leaks, using a solution of soapy water to identify any areas where gas is escaping. If you find a leak, have it repaired immediately!

  • Clean the exterior: be sure to clean the exterior of the tank every other month with soap and water to remove dirt, dust, and other debris. They can cause damage to valves and regulators over time, leading to costly repairs or replacements. Remember to rinse the tank thoroughly to remove any soap residue.

  • Protect the valve: keep the valve on the tank clean and protected from damage. Never use tools or other objects to open or close the valve, as this can damage it.

  • Keep it upright: Always keep the tank upright to prevent gas from leaking out or causing damage to the tank.

Use High-Quality LP Gas

Using high-quality LP gas is important for maintaining an RV LP system because it helps to prevent issues that can arise from impurities in the fuel. LP gas that is contaminated with impurities like moisture or particulate matter can clog the RV LP system's regulator and hoses, leading to decreased efficiency and potential safety hazards. On the other hand, LP gas that is pure and of high quality burns more efficiently, which means that the RV LP system will use less fuel to achieve the same level of heat. This can help to save money on fuel costs and reduce emissions. High-quality LP gas can also help reduce the risk of fires or explosions in the RV LP system. Impurities in the fuel can cause problems like incomplete combustion or gas leaks, which can be dangerous. High-quality LP gas that is free from impurities will help to ensure that the RV LP system runs safely.

Install an LP Gas Detector

An LP gas detector is designed to detect the presence of propane gas in the air. If there is a gas leak in the RV, the detector will sound an alarm to alert the occupants. This can be very helpful for RVers because propane gas leaks can be dangerous, and the detector can help to prevent accidents or injuries. An LP gas detector also provides early warning of a gas leak, which can give occupants time to evacuate the RV and take appropriate action. This can be especially important if the leak is in a confined space or if the occupants are sleeping. That is why just knowing that there is an LP gas detector installed in the RV can give occupants peace of mind, especially when using the RV for extended periods of time or in remote locations.

Consult a Professional Technician

Since LP gas is a potentially dangerous substance working on an RV LP system can be hazardous if not done correctly. A professional technician has the training and expertise to work safely with propane gas and can ensure that the system is installed and maintained in a way that is safe for the occupants of the RV. They can check the pressure, flow rate, and other factors that can affect the system's performance, and make adjustments as needed to optimize its efficiency. There are regulations and standards that apply to the installation and maintenance of RV LP systems, and a professional technician will be familiar with these requirements.

Know when a Replacement is Needed

Maintainance of your RV LP system is key, but it is equally important to know when it is time for a change. Since LP gas is flammable, using old or expired propane tanks can increase the risk of accidents or leaks. Replacing your RV LP on time helps to ensure that the tanks are in good condition and free from defects that could lead to safety hazards. Not to mention that over time, propane tanks can degrade or become less efficient, which can reduce the performance of your RV LP system. That is why by replacing your LP gas on time, you can ensure that your RV LP system is operating at peak efficiency.

RV maintenance tips

RV Propane System Troubleshooting

RV propane system troubleshooting

RV Propane isn't Flowing, what to do?

If your RV propane is not flowing, there are a few things you can check:

  • Check the propane tank valve: Ensure that the propane tank valve is open. If it is closed, open it and try using the propane system again.

  • Check the propane regulator: Inspect the propane regulator for any damage or debris that may be blocking the propane flow. If the regulator is damaged or clogged, replace it with a new one.

  • Check the propane lines: Inspect the propane lines for any damage or kinks that may be blocking the propane flow. If you find any damage, replace the affected propane lines.

  • Check the propane appliances: Make sure that all propane appliances are turned off. If any of them are on, turn them off and try using the propane system again.

  • Purge the propane lines: Purge the propane lines by turning off all propane appliances and the propane tank valve. Then, open one propane appliance at a time and light it until the propane flows steadily with no sputtering or air bubbles. Repeat the process for all propane appliances until the air is purged from the propane lines.

If you are still experiencing issues with your RV propane not flowing, it may be best to contact a professional for assistance.

How to check propane pressure in the RV LP system?

To check the propane pressure in an RV LP system, you can use a propane gas pressure gauge or manometer. Connect the gauge to the propane tank and turn on the propane system. The gauge will display the pressure reading, which should be between 11 and 14 inches of water column (WC) for most RV propane systems.

RV propane stove not lighting - troubleshooting tips

If your RV propane stove is not lighting, check that the propane tank is not empty, and the propane lines are not clogged or damaged. Ensure that the propane valve is open, and the stove is properly connected to the propane system. You may also need to clean the stove burners or replace the ignition sparkers.

RV propane system not working - what could be the problem?

There are several reasons why an RV propane system may not work, including an empty propane tank, clogged propane lines, a faulty propane regulator, or a malfunctioning propane appliance. You may need to troubleshoot each component of the propane system to identify the problem and fix it.

How to purge air from RV propane lines?

To purge air from RV propane lines, turn off all propane appliances and the propane tank valve. Then, open one propane appliance at a time and light it until the propane flows steadily with no sputtering or air bubbles. Repeat the process for all propane appliances until the air is purged from the propane lines.

RV propane tank not supplying gas - what to do?

If your RV propane tank is not supplying gas, check that the propane tank valve is open and the tank is not empty. You may also need to inspect the propane regulator for damage or clogs and ensure that the propane lines are not damaged or kinked.

RV propane detector keeps going off - how to fix it?

If your RV propane detector keeps going off, check that there is not a propane leak in the RV. You may need to inspect the propane system for leaks and repair or replace any damaged components. If there is no propane leak, the detector may be faulty, and you may need to replace it.

How to replace a faulty propane regulator on an RV?

To replace a faulty propane regulator on an RV, turn off the propane tank valve and disconnect the propane lines from the regulator. Remove the old regulator and install the new one in its place, reconnecting the propane lines and tightening the fittings. Test the propane system for leaks and proper operation.

RV propane furnace not igniting - troubleshooting steps?

If your RV propane furnace is not igniting, check that the propane tank is not empty and the propane lines are not clogged or damaged. Ensure that the propane valve is open, and the furnace is properly connected to the propane system. You may also need to clean the furnace burners or replace the ignition sparkers.

How to safely refill RV propane tanks?

To safely refill RV propane tanks, turn off all propane appliances and the propane tank valve. Then, disconnect the tank from the propane system and take it to a certified propane refill station. Follow the station's instructions for refilling the tank, ensuring that it is filled to the proper level and that all fittings are properly tightened.

RV propane leak - how to detect and fix it?

To detect an RV propane leak, use a propane gas leak detector or a mixture of soap and water to check for bubbles around propane fittings and connections. If you detect a propane leak, turn off the propane tank valve and open all windows and doors to ventilate the RV. Repair or replace any damaged propane components and test the propane system for leaks before using it again.


Maintaining an RV LP system is an important part of ensuring that your RV is safe, efficient, and reliable. It can seem complicated, but by following the tips we have highlighted above for your RV LP system maintenance, you can help to prevent problems, extend the life of the system, and reduce the risk of accidents or breakdowns while using your RV. Happy RVing!

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