RV winterization protects water-bearing parts of your vehicle from damage when temperatures drop. The exact steps depend on the RV’s design, equipment, and manufacturer instructions, but the service usually starts with a system review and ends with checks to confirm the plumbing is protected. Knowing what technicians do can help you prepare, ask useful questions, and understand which steps may need to be reversed before your next trip.
Review the RV and its systems
A technician typically begins by identifying the RV’s water-system layout and installed equipment. This may include the freshwater tank, water heater, pump, filters, low-point drains, and any bypass valves. Appliances such as an ice maker, washing machine, or outdoor shower can have separate lines that need attention. The RV’s manual helps confirm the correct procedure and any model-specific precautions.
Before work starts, point out any known plumbing problems, recent repairs, or features that may not be obvious. Let the technician know if the RV has an unusual water setup or if you plan to store it with particular equipment in use. This conversation helps prevent overlooked lines and clarifies what the service includes.
Drain water from the plumbing
The technician generally disconnects the RV from city water, turns off the water heater, and drains the freshwater tank and plumbing. They open faucets and designated drain points so water can leave the lines. The water heater is handled according to its manufacturer’s instructions; it should not be drained while hot or pressurized.
Filters and other components that can trap water may need to be removed or drained separately. Technicians also check tanks and fixtures that are easy to miss, such as toilet supply lines, exterior sprayers, and shower hoses. Draining reduces the amount of water left to freeze, but it does not always remove every drop from the plumbing.
Protect water lines and fixtures
Depending on the RV and the service method, the technician may use RV-approved, nontoxic antifreeze in the plumbing or clear the lines with compressed air. With antifreeze, they route it through the water lines and fixtures until it reaches the outlets. With air, they use controlled pressure suited to the system. The right approach depends on the RV maker’s guidance and the equipment installed.
The technician may also protect toilet valves, sink and shower traps, and other places where water can remain. A water-heater bypass, if fitted, helps keep antifreeze out of the heater tank. Ask which method was used and whether any steps remain before using the RV again. Never use automotive antifreeze in an RV drinking-water system.
Check connections and explain next steps
Before wrapping up, a technician can check that drain points are closed or left in the position specified for storage, confirm that exposed connections are protected, and review any system-specific concerns. Winterization focuses on freeze protection; it is not automatically a full inspection of the roof, chassis, batteries, or every appliance. Ask about separate maintenance needs if you want those checked.
Request a clear summary of what was drained, bypassed, or treated, along with instructions for de-winterizing. Before your next trip, the plumbing may need flushing, filters reinstalled, and the water heater returned to service using the manufacturer’s procedure. West Michigan RV Care can explain its winterization process and help you plan the service for your RV.
A careful winterization service follows the RV’s specific plumbing layout, removes or protects water where it can freeze, and explains what to do before the next use. Keep the service notes with your RV records so spring setup is easier. Contact West Michigan RV Care to ask about winterization for your model.