Before the First Frost: A Guide to Winterizing Your RV

Larry Hartel | Pension & Financial Wellness Committee Member

Winterizing your RV is necessary to protect it from freezing temperatures and moisture damage during the colder months. It also prevents critters from making themselves at home and damaging the unit. By following this step-by-step guide, you can ensure that your unit is running smoothly again in the spring after sitting immobile all winter long.

Materials Needed:

• RV antifreeze (non-toxic, propylene glycol-based)
• Water pump converter kit (optional, but helpful)
• Basic tools (wrenches, screwdrivers, etc.)
• Bucket
• Hose (if needed)
• Air compressor – maximum 50 PSI (optional, but I prefer blowing lines clean after treating to reduce odour in lines)
• Blow out plug
• Paper towels or rags
• Steel wool

Steps to Winterize Your RV

1. Drain Water Systems

The time has come to empty all water systems before they freeze. This includes draining the freshwater tank, as well as the holding tanks: the gray (collects wastewater from sinks and shower) and the black (collects wastewater from toilet).

• Turn off the water heater and let it cool down.
• Open the drain plug and drain the water heater tank.
• Open all faucets (hot and cold) and let the water run until it's empty.
• Locate and drain the freshwater tank.
• Open the low-point drain valves (usually found underneath the RV) to remove any remaining water.

2. Perform a Deep Clean

When doing your seasonal clean-out and scrub-down, don’t leave behind any personal items in the RV over the winter – especially tissues and toilet paper, which are fantastic for nesting material.

3.  Add Antifreeze

Using a Water Pump Converter Kit:

• Connect the water pump converter kit to the city water inlet – this allows you to use a jug of RV antifreeze.
• Pour RV antifreeze into the jug and turn on the water pump to begin pumping antifreeze into the system.
• Open each faucet (starting with the furthest from the pump) until you see antifreeze coming out. Don't forget the toilet, shower, and outdoor shower.

Using Compressed Air (alternative method):

If you have access to compressed air, you can blow out the lines instead of using antifreeze. I do both antifreeze and air. Some choose to use one or the other, but I find this ensures lubrication of all valves and door reduction in lines for spring start-up. If using compressed air, you should not exceed 50 PSI.

• Connect the air compressor to the city water inlet using a blow-out adapter and blow air through the system to push out the water. If you do not blow out the city connection, you should pump antifreeze into it.
• Make sure to open all faucets and drains during this process.
• When completed, pour RV antifreeze down all drains and toilet to winterize the traps.

4. Winterize the Toilet

Add RV antifreeze to the toilet bowl and flush it until antifreeze is visible in the bowl and the tank. I have never owned a unit with a black tank flush; however, these must also be winterized. You can purchase a hand pump to pump antifreeze into this system.

5. Check the Refrigerator

Remember to clean out the refrigerator and remove any food and perishable items from the RV. It’s also a good idea to leave the refrigerator door slightly ajar to prevent mold and any unpleasant smells. You can place a box of baking soda inside to help absorb odors.

6. Seal Up the RV

Inspect and seal any openings including windows, vents, and doors to prevent moisture and pests from entering. Steel wool is great for sealing any gaps. Check the roof and slide-outs for leaks and seal them if necessary.

7. Remove RV Batteries

If possible, remove the batteries and store them in a warm place and keep them trickle-charged throughout the winter. If not possible, ensure trickle charge through winter while in place, but this will reduce the life expectancy of the battery.

8. Cover Your RV (optional)

If you're storing your RV outside, consider using a breathable RV cover to protect it from snow and ice. Avoid plastic covers, as they can trap moisture.

9. Critter-Proofing

To keep critters out, check all RV water and sewer lines, as well as electrical entry points. Be sure to seal them with spray foam or steel wool.

10. Final Check

Go through the RV one last time to ensure everything is secure and winterized.

Additional Tips

• Always check your owner's manual for specific winterizing instructions for your RV model.
• Consider using a moisture-absorbing product in the interior to prevent condensation and mould growth.
• If you're unsure about any steps, consult a professional or an experienced RV owner.

By following these steps, you can effectively winterize your RV and keep it in top shape

By following these steps, you can ensure your RV is winter-ready and keep it in top shape all season long, ready to hit the road again when adventure calls!

Reviewed by Joe Secreti
Journeyman Recreational Vehicle Technician

Larry Hartel
Chair, Pension & Financial Wellness Committee