Michigan winters can bring prolonged freezing temperatures, so preparing your RV before cold weather arrives helps protect its plumbing and interior. Start with the owner’s manual, since winterization steps vary by model and water-system design. Set aside enough time to drain the system fully, protect any remaining water lines, and prepare the exterior and interior for storage. If you are unsure how a component works, ask an RV service professional before using compressed air or antifreeze.
Drain the Water System
Park on level ground, turn off the water heater, and let hot water cool before draining. Disconnect the city-water hose and switch off the water pump. Empty the fresh-water tank, then open faucets and low-point drains to release water from the lines. Drain the water heater according to its manual; never remove the drain plug or anode rod while the tank is hot or pressurized.
Empty and rinse the gray- and black-water tanks at an approved dump station. Clean the toilet and tank as directed by the manufacturer. Check for water in outdoor showers, filter housings, and appliances with water connections, such as an ice maker or washer. Bypassing the water heater before adding antifreeze helps keep antifreeze out of the tank.
Protect Pipes and Fixtures
Choose the winterization method recommended for your RV. Some systems use RV-specific, non-toxic antifreeze; others allow compressed air to clear water from the lines. Use only antifreeze labeled for RV potable-water systems, and never use automotive antifreeze. If using compressed air, keep pressure within the limit in your owner’s manual because excessive pressure can damage plumbing.
If using antifreeze, follow the product and RV instructions to draw it through the water lines and fixtures. Open each faucet until the expected flow appears, and include the toilet, outside shower, and other connected outlets. Add antifreeze to drains as directed to protect the traps. Do not overlook the washing machine, dishwasher, or other accessories; their winterization steps may differ.
Prepare the Exterior and Interior
Wash the RV and inspect the roof, windows, and seams for cracks or gaps that could let in water. Repair damaged sealant with a product approved for your roof material. Remove leaves and debris from roof drains and awnings, then dry the awning before storing it. Check tire pressure and consult the manual for guidance on tire care during storage.
Remove food and anything that could freeze, leak, or attract pests. Clean the refrigerator and leave its doors propped open if the manual recommends it. Take out batteries from small devices, and maintain the RV’s batteries according to their care instructions. Close blinds, secure loose items, and use ventilation or moisture control as appropriate for your storage location.
Do a Final Winter Check
Walk through the RV with a written checklist and confirm that tanks, lines, and appliances have been handled. Make sure the water heater is off and bypassed if required, faucets are closed, and exterior openings are secured. Label the RV or place a reminder by the controls so no one turns on the pump or water heater before the system is returned to service.
Store the RV on a stable surface and use a breathable cover designed for your vehicle if you choose to cover it. Avoid trapping moisture with a poorly fitted tarp. Check the RV periodically for signs of leaks, pests, or excessive moisture, and follow the manufacturer’s guidance for any maintenance needed during storage.
Careful winterization helps reduce the risk of frozen pipes and costly water damage. Follow your RV’s manual, take your time with every connected fixture, and get help if a system is unfamiliar. For support with seasonal preparation in the Grand Rapids area, contact West Michigan RV Care.