Propane is one of the most essential and versatile resources in your RV—but it’s also one of the most misunderstood by new RV owners. That’s why Go RVing teamed up with the experts at the RV Technical Institute to break down the basics in this Propane 101 how-to video.
Whether you’re prepping for your first RV trip or just want to be more confident with your propane setup, this guide has everything you need to know to safely manage and monitor your RV’s propane system.
What Does Propane Power in Your RV?
Your RV’s propane system does a lot of heavy lifting, especially when you’re camping off-grid or boondocking. Here are the most common appliances that run on propane:
- Furnace: Keeps your RV warm in cold weather
- Stovetop: Allows you to cook meals when not connected to shore power
- Water Heater: Heats your water for showers and dishwashing
- Refrigerator: Can operate on propane when electric isn’t available
Propane is especially important when you’re dry camping or staying at a site without full hookups, making it essential to understand how the system works—and how to manage it.
Dual Propane Cylinder Setup: How It Works
Most towable RVs are equipped with two vertical propane cylinders mounted on the front A-frame. Class A and larger motorhomes typically use a horizontal onboard propane tank.
If you have two portable cylinders, they’re usually connected to a dual tank automatic changeover regulator, which is where many new RVers get tripped up.
Key Things to Know:
- The regulator has a lever or arrow that you should point toward the primary tank you want to draw from first.
- When both tanks are turned on, the system will automatically switch to the second tank when the first one runs out.
- A small viewing window on the regulator will show green when the system is running normally. When the primary tank is empty, it will turn red, indicating the changeover has occurred.
- At that point, turn the lever to the full tank (now in use), and remove and refill the empty one.
Pro Tip: Always leave both tanks turned on for automatic switching. Just make sure to monitor usage so you don’t accidentally run both dry!
How to Tell How Much Propane You Have Left
Unlike gasoline or freshwater, propane doesn’t always have a visible gauge, especially on portable cylinders. But you still have a few good options to estimate remaining levels:
1. Use an Inline Propane Gauge
These small screw-on devices attach between the tank and the regulator. They give a basic dial readout of how full your tank is and are available at most RV supply stores.
2. Try the Hot Water Trick
Boil a small pot of water, pour it slowly over the side of the tank, and then feel the metal. The propane level will feel cool to the touch where the liquid propane starts. It’s a surprisingly effective, low-tech solution.
3. Stick-On Magnetic Gauges
These adhesive-backed strips change color to indicate the propane level. They’re easy to apply and affordable, though not always 100% accurate.
4. Check Your RV’s Control Panel
Many motorhomes and some high-end trailers have built-in monitor panels that show propane levels, usually in increments (full, 2/3, 1/3, empty).
Cylinders vs. Tanks: What’s the Difference?
- Cylinders (vertical, removable) are typically used on towables like travel trailers and fifth wheels.
- Tanks (horizontal, built-in) are found on Class A motorhomes and must be refilled on board at a propane refill station.
Both types serve the same function, but only certified technicians should work on built-in tanks.
Propane Safety Tips for RVers
- Always transport and store cylinders upright.
- Do not smoke or use open flames near propane tanks.
- Turn off the propane system when refueling your RV or tow vehicle.
- Use leak detectors (installed or handheld) to check for potential gas leaks.
- Don’t use propane appliances while driving. Although some RVers do, it’s safer to wait until you’re parked.
- Get your system inspected annually by a certified RV technician.
What to Do If You Smell Propane
If you ever smell propane in or around your RV:
- Turn off the main propane supply valve immediately.
- Exit the RV and move away from the area.
- Don’t use any electronics or ignite flames.
- Call for professional help or contact your campground host or emergency services.
Propane is generally very safe when used properly, but it’s flammable and should always be treated with care.
Bonus Tip: Practice in Your Driveway
Before your next trip, take the time to practice switching propane tanks, turning on appliances, and checking fuel levels at home. Familiarity will give you peace of mind on the road.
Get More RV Training from the Experts
Want to keep building your RV confidence? The RV Technical Institute is the industry’s leading educational resource for RV systems, safety, and maintenance. Their mission is to make RVing easier and more accessible for everyone through hands-on and virtual training programs.
Visit RVTI.org to explore free how-to videos, safety checklists, and in-depth technical courses—whether you're new to RVing or just want to learn more about how your rig works.
Final Thoughts
Propane is the powerhouse behind many of your RV’s most important features—from hot showers and warm meals to staying cozy on cold nights. Understanding your system—and how to use it safely—will ensure you can relax and enjoy your travels with confidence.
For more beginner-friendly videos and resources, check out the rest of our RV 101 video series created in partnership with the RV Technical Institute. We've got you covered, one system at a time!
