RV Winterization Checklist: Get Your Camper Ready for Storage

RVtravel’s headline “Follow these steps to prepare your RV for winter” puts a familiar seasonal task back on the camping agenda. The takeaway is straightforward: give your camper a proper storage day before freezing weather arrives. This RV winterization checklist turns that reminder into a system-by-system plan.

Winterizing is more than pouring pink fluid into a drain. It means removing or protecting water wherever it can remain, shutting down equipment correctly, and preparing the camper for weeks or months without regular use. A compact travel trailer and a motorhome with a washer, ice maker, and hydronic heating system need different procedures.

Use this guide as a task list, not a replacement for the owner’s manual. Gather the RV manual and instructions for the water heater, pump, filters, batteries, and specialty appliances before starting. Set aside a daylight work session, with time to pick up a missing fitting instead of improvising.

Finish before freezing conditions reach your storage location. Exposed lines, outside showers, and unheated compartments may approach outdoor temperatures even when the living area stays warmer. Do not assume a brief freeze is harmless or that an enclosed underbelly protects every component.

If another trip is on the calendar, decide whether you will use a manufacturer-approved cold-weather setup or winterize between trips. A heated cabin does not necessarily protect the pump, tank valves, or exterior fixtures. Do not rely on a portable heater in an unattended camper as your storage plan.

The antifreeze method uses a winterization inlet or approved pump pickup to move RV plumbing antifreeze through designated water lines. The compressed-air method uses regulated air through an approved connection to clear water from those lines. Some manufacturers specify a combination, and some appliances require additional procedures.

Use only antifreeze labeled for RV or marine potable-water plumbing and compatible with your components. Never put automotive engine coolant in the freshwater system. Read the product instructions and protection rating: a burst-protection rating does not mean the fluid stays liquid at that temperature. Do not dilute it unless the label explicitly requires dilution.

For a conventional small RV with a bypassed tank-style water heater, 2 to 4 gallons is a useful shopping estimate, not a guaranteed requirement. Larger rigs and additional appliances may need more. Follow the specified procedure and keep a spare sealed gallon if supplies will be hard to find.

For compressed air, find the permitted winterization pressure in the RV and component instructions. Respect the lowest applicable limit. If you cannot establish the approved connection and pressure, do not borrow a generic setting or guess.

Empty black and gray holding tanks at an approved dump station. Flush them only as their instructions allow, then drain the rinse water. Keep sewage equipment separate from freshwater tools. Drain the freshwater tank and locate the hot- and cold-water low-point drains using the plumbing diagram.

Before draining the water heater, switch off every heating source, including electric, propane, and automatic controls as applicable. Let the water cool, disconnect the water supply, turn off the pump, and relieve pressure according to the heater manual. Do not remove a drain plug or anode rod from a hot or pressurized heater.

Drain a conventional tank-style heater using its specified procedure. Inspect the plug, threads, and anode if fitted. Tankless heaters and hydronic systems need their own winterization instructions. A tankless unit may retain water in small passages even after its drain is opened, so a tank-style checklist is not enough.

If the prescribed antifreeze method calls for a water-heater bypass, set it exactly as shown in the manual. The bypass prevents unnecessary filling of the heater, but it does not drain or winterize the heater itself. Photograph valve positions before and after changing them.

For the antifreeze method, configure the approved pickup and valves, then operate the pump according to the manual. Work through every hot and cold outlet until the required antifreeze condition is reached, commonly a steady flow matching the product’s original color. Catch discharge where practical and handle it according to the label and local requirements. Follow any specified outlet order; lightly pink, diluted water is not proof of adequate protection.

For compressed air, use the approved inlet, regulated pressure, and opening sequence. Keep an outlet open as directed and clear every hot and cold branch. Clearing faucet lines does not automatically clear the pump, strainer, accumulator, inlet check valves, or appliance solenoids. Each needs its specified draining or protection procedure.

Do not casually press the city-water inlet check valve while the system is pressurized. Some manuals require a particular check-valve winterization step; others use a different arrangement. Follow the procedure precisely or leave it to a technician.

Protect sink and shower traps with RV antifreeze in the amount specified for the fixture and product. Around 1 cup per small trap is a common planning allowance, not a universal dose. Protect the toilet bowl seal and holding-tank components only as their manufacturers recommend.

Empty and clean the refrigerator, freezer, pantry, and cooking area. Dry them thoroughly, then use the appliance’s storage latch or approved method to keep doors ventilated. Remove food, toiletries that could freeze, damp bedding, and loose liquids. Repair leaks before covering the RV; a cover cannot fix failed sealant.

Battery care depends on chemistry and equipment. Prepare lead-acid batteries as directed, including checking electrolyte only on serviceable flooded batteries. Lithium batteries may require a different storage state of charge and temperature range. Many cannot accept charging below freezing without approved low-temperature protection or heating.

If batteries stay installed, confirm what the disconnect switch actually isolates. Some devices remain connected and can drain the battery. Use only a charger or maintainer approved for the chemistry and installation. If removing a conventional negative-ground battery, follow the vehicle procedure, normally disconnecting negative first and reconnecting it last. Store batteries securely with terminals protected.

Check cold tire pressures against the RV and tire manufacturers’ storage guidance. Park on a stable, well-drained surface, use suitable chocks, and protect tires from prolonged sun exposure where recommended. Stabilizer jacks are not lifting equipment; do not use them to unload the tires unless the manufacturer explicitly permits it.

Walk around the RV, open each storage compartment, and compare the work with your fixture list. Look for overlooked hoses, bottles, damp items, and unlocked compartments. Confirm the parking position, chocks, cover straps, and storage-site access arrangements.

If two people are working, divide responsibilities rather than duplicating effort. One person can handle plumbing and valve settings while the other tackles interior drying, tires, and supplies. Give each task one owner, then have the second person verify key items such as heater shutdown and exterior fixtures.

Keep the record in one place. Use CampMate to organize a reusable storage checklist and packing list for the winterization kit. Keep completion dates, valve photos, and appliance instructions alongside your maintenance notes so spring does not depend on memory.

Schedule periodic storage visits at an interval suited to your climate, facility, and equipment. Check for moisture, cover movement, tire-pressure changes, and battery issues. Follow the RV manufacturer’s snow-load guidance rather than assuming the roof can handle whatever the season brings.

A reliable RV winterization checklist covers every water-containing component, follows model-specific instructions, and includes the rest of the camper. The finish line is not an empty antifreeze jug. It is a verified fixture list, properly stored batteries and appliances, and a dry, securely parked RV.

Before closing the door, leave a visible reminder that the water system is winterized and the heater must not be energized until its spring procedure is complete. Save your supply list, completion notes, and reversal steps together. When camping season returns, you will have a restart plan instead of a valve-position guessing game.