Most RV dealers charge between $150-$300 for winterization services that primarily involve blowing out water lines and adding RV antifreeze to the system. The actual process is straightforward enough that many owners can handle it themselves with basic tools and about an hour of time. The premium you pay at dealerships often covers the same steps you’d follow with a $30 winterization kit.
The key steps involve draining all water tanks, bypassing the water heater, and either blowing compressed air through the lines or pumping non-toxic RV antifreeze through the system. Air blow-out method costs almost nothing but requires an air compressor, while the antifreeze method needs a few gallons of RV antifreeze but works with your existing water pump. Both approaches achieve the same goal: preventing water from freezing and cracking pipes or fittings.
There are legitimate reasons to pay for professional winterization — if you’re uncomfortable working with plumbing connections, lack the tools, or own a complex motorhome with multiple water systems. Some warranty requirements also specify professional service. But for most travel trailers and fifth wheels, the process is more about following a systematic checklist than requiring specialized expertise.
The money saved on DIY winterization often pays for better RV covers, surge protectors, or other storage prep that dealers don’t typically include in their packages. Learning the process also helps you understand your RV’s water system better, which proves valuable when troubleshooting issues during camping season.