Winter in Southern Utah is gorgeous… until we get a cold snap and your RV pipes decide to reenact Frozen and let it go all over your underbelly.
If you’re living in your RV full-time in Hurricane or St. George, your plumbing system is the most vulnerable part of your rig — and the cost of a freeze is no joke.
The good news? With a little prep and a few smart habits, you can stay cozy, keep your water flowing, and avoid expensive winter repairs. Here are the five most important things you can do right now to protect your RV from freezing temperatures.
1. Use a Heated Water Hose (or Disconnect at Night)
A standard hose is basically a freeze magnet. All it takes is one cold night for it to become a rigid popsicle that blocks your fresh water supply or bursts completely.
A heated water hose keeps water moving even in subfreezing temps. If you don’t have one yet, the next best thing is to disconnect your hose overnight and rely on your onboard water tank until morning.
If you suspect the issue isn’t the hose but the water heater itself, check out our RV water heater repair services.
2. Insulate Your Water Lines & Sewer Hose
Your rig’s exterior plumbing is the first thing to freeze. Wrapping exposed water lines with heat tape, pipe insulation, or even pool noodles gives you a big buffer against dropping temps.
Your sewer hose can freeze too — especially if you leave valves open (don’t do that). Insulating the hose or storing it between uses helps prevent cracking and blockages.
If you suspect leaks or damage, our RV plumbing repair services can help prevent bigger issues before they start.
3. Keep Your Underbelly Warm
If your RV has a heated, enclosed underbelly, the easiest solution is running your furnace, which pushes warm air into that space. If it doesn’t, consider safe options like:
- A small thermostatically controlled heat pad
- A low-wattage bulb in the wet bay
- Tank heating pads (if your rig supports them)
If your furnace is acting up, short cycling, or blowing cold air, our RV furnace repair service covers troubleshooting and fixes.
4. Don’t Let Your Holding Tanks Stay Too Low
Here’s a weird-but-true fact: a fuller tank freezes slower.
A couple of inches of water adds thermal mass and slows down freezing, especially overnight.
Do NOT leave valves open — that creates a perfect “poopsicle” opportunity.
Keep your tanks closed and dump only when mostly full.
If you’re having tank issues, odors, or freeze-related blockages, our friends at Kleen Tank of Southern Utah can help.
5. Keep Cabinet Doors Open Where Plumbing Runs
Any plumbing that runs along exterior walls or under sinks is more exposed to cold. Opening cabinet doors, especially at night, allows warm interior air to circulate around those pipes.
It’s not glamorous, but hey — RV winter life is more about survival than aesthetics.
If you’re already noticing slow flow, freezing pipes, or pressure problems, schedule mobile RV service before it becomes a bigger repair.
Conclusion
Living in your RV full-time through winter doesn’t have to feel like a battle against Mother Nature. With the right setup — heated hose, insulation, warm underbelly, smart tank management, and airflow — you can stay comfortable and avoid costly repairs.
If you need help winterizing your plumbing system or you suspect something has already frozen, we’ve got you. Expedition Mobile RV Services is on the road throughout Hurricane, La Verkin, St. George, Washington, and surrounding Southern Utah towns. We’ll help you stay warm, keep water flowing, and make winter RV life as smooth as possible.