How To Winterize A Travel Trailer?

Winterizing a travel trailer is a critical process for protecting the vehicle from cold-weather damage. Proper procedures prevent costly repairs to plumbing systems and interior components, ensuring the trailer is ready for use when warmer seasons return.

Understanding the Winterization Process

Winterization involves preparing a travel trailer for storage during freezing temperatures. The primary goal is to remove all water from the plumbing system to prevent it from freezing, expanding, and causing pipes, fixtures, or tanks to crack.

This process is necessary even in regions with mild winters, as unexpected cold snaps can occur. The steps are methodical and require specific tools and materials to complete effectively.

Failing to winterize can lead to significant water damage and expensive repairs. The process is a standard part of responsible travel trailer ownership and maintenance.

Essential Tools and Supplies

Gathering the correct items before starting is important for an efficient process. Necessary tools typically include a standard water hose, a water pump converter kit or bypass tool, and a set of basic wrenches.

Supplies often consist of non-toxic, RV-specific antifreeze, typically propylene glycol-based. The required amount depends on the length and complexity of the trailer’s plumbing system. A freshwater tank drain valve wrench may also be needed.

Personal protective equipment like safety glasses and gloves is recommended when handling antifreeze. Having all items on hand before beginning prevents interruptions.

Selecting the Correct Antifreeze

Only antifreeze labeled specifically for potable water systems in recreational vehicles should be used. This type is non-toxic and safe for the plumbing system.

Automotive antifreeze is toxic and must never be introduced into an RV’s water lines. Using the wrong product can contaminate the system and pose health risks.

The product’s instructions will specify the amount needed based on plumbing system size. It is prudent to purchase slightly more than the estimated requirement.

Step-by-Step Winterization Procedure

The procedure follows a logical sequence to ensure all water is removed or displaced. It begins with draining the existing water from all tanks and lines.

Draining the Freshwater System

Start by draining the fresh water holding tank. Locate the drain valve, usually on the underside of the trailer, and open it fully. Ensure the water pump is turned off at the control panel.

Open all faucets inside the trailer, including the shower and any exterior spray ports, to allow air into the lines and help water drain. Do not forget the toilet valve; flush it until no water remains in the bowl and holding tank.

The water heater must be drained separately. It is crucial to turn off its power source and allow the unit to cool completely before opening the drain plug or anode rod. Opening the pressure relief valve on the heater can aid drainage.

Bypassing the Water Heater

Most winterization guides recommend bypassing the water heater. This prevents antifreeze from filling the large water heater tank, saving a significant amount of antifreeze.

Many RVs have built-in bypass valves. If not, a temporary bypass kit can be installed. Consult the trailer’s owner manual for the specific location and method for the unit.

Bypassing ensures the antifreeze flows directly through the cold and hot water lines without entering the heater tank, making the process more efficient.

Introducing the Antifreeze

With the system drained and the water heater bypassed, antifreeze can be introduced. One common method is to use a water pump converter kit, which draws antifreeze directly from its container.

Disconnect the freshwater tank intake line from the water pump and connect it to the suction tube of the converter kit, which is placed in the antifreeze container. Turn on the water pump.

Systematically open each faucet, starting with the one closest to the pump, and run it until pink antifreeze flows steadily. Repeat for all cold and hot water faucets, the toilet valve, shower, and any appliance like an ice maker or washing machine.

Finally, pour a cup of antifreeze down each drain trap to prevent any residual water in the P-traps from freezing.

Additional Winter Preparation Tasks

While protecting the plumbing is paramount, other steps help preserve the trailer’s overall condition during storage.

Thoroughly clean the interior, removing all food to deter pests. Consider placing moisture-absorbing products inside to control humidity. Prop open refrigerator and freezer doors slightly to prevent mold.

Exterior maintenance includes a good wash and wax to protect the finish. Covering tires or moving the trailer periodically can prevent flat spots from forming. Ensure the storage parking brake is engaged and the trailer is level.

Battery and Appliance Care

Disconnect the trailer’s battery and store it in a cool, dry place. A maintenance charger can be used to keep the battery charged during storage if desired.

Appliances should be prepared according to their manuals. This often means turning off propane valves and ensuring all systems are powered down. Vents and openings should be covered to prevent rodent entry.

Conclusion of the Process

Once all steps are complete, the travel trailer is considered winterized. It is good practice to place a note inside indicating the trailer is winterized, so no one accidentally tries to use the water system.

The trailer can now be stored for the winter season. When ready to use the trailer again, a de-winterization process will be required to flush the system and restore normal function.

Following a comprehensive winterization checklist each year is the most reliable method for preventing cold-weather damage. This process helps ensure the longevity and reliability of the travel trailer.