How to Winterize a Camper: Complete Canadian Checklist

To winterize a camper, drain and protect the plumbing, prepare the exterior, protect batteries and propane systems, and control moisture before freezing temperatures arrive. Skip it, and winter can break your pipes, destroy your cushions, and damage your battery. If you do it right, your camper will wake up fine in the spring.

Here's the short answer. You drain and protect the plumbing, then set up the water heater. You also check the outside and handle batteries and propane safely. You control moisture and pests before the freeze sets in.

Each RV is constructed in a slightly different way. Let's go through each step one by one. We'll refer you back to your owner's manual throughout the way. This guide deals with storage winterizing first, and then briefly addresses winter camping at the end.

Key Takeaways

• Sequence matters. Drain the plumbing, bypass the water heater, and then add the antifreeze.

• The selection of antifreeze is important. Only use propylene glycol RV or marine antifreeze. Avoid automotive antifreeze.

• Cold is not a battery's best friend. A battery that is significantly discharged can freeze at temperatures below -10°C. Keep it charged, or bring it indoors.

• Silent damage is caused by moisture and pests. Your camper is protected all winter with a dehumidifier, breathable cover, and sealed entry points.

• Each RV is unique. Any general guide, including this one, is superseded by your owner's manual.

Quick Winterization Checklist

• Drain and protect plumbing before temperatures drop below freezing.

• Prepare the exterior by checking seals, tires, and covers.

• Protect batteries, propane systems, and electrical equipment for storage conditions.

• Control moisture and pests to prevent spring damage.

Do You Store Your Camper or Use It All Winter?

These are 2 different projects. Storage winterization is a complete shutdown of the camper for 4-6 months. All systems are drained before they freeze.

Winter camping keeps water, heat, and battery systems active through cold nights, using heated hoses, insulation, and reliable power.

What Do You Need Before You Begin?

A little preparation saves a lot of frustration. You don't want to look for a wrench with wet hands halfway through the job. Most of the items can be found at any RV supply store in Canada.

• Antifreeze for RV or marine potable water systems

• A water pump converter kit or bypass hose

• If you want to use an air compressor, use one that has a blow-out plug

• A set of screwdrivers and adjustable wrenches

• Rubber gloves and safety glasses

• Steel wool and silicone caulk to seal pest entry points

• A moisture absorber or small dehumidifier

• A tire pressure gauge

Should You Use the Blowout Method or RV Antifreeze?

There's no single right answer to this common question. The best way to do it will depend on your RV's plumbing system and manual. Many Canadian RVers use both for added security.

In either case, review your manual to find your RV's specific low point drain locations. This is where most errors occur (if you skip).

What is the Best Way to Prepare the Plumbing System?

The plumbing system is the lifeline of any winterization project, so take it easy here. If you get this one right, the rest will fall into place. Hurry up, and a broken pipe may be concealed behind a wall until spring.

Turn off the Water and Drain the Fresh Tank

Unplug from the city water supply and shut off the water pump. Open the freshwater tank drain valve and allow gravity to do the rest. This alone extracts a surprising amount of water.

Drain or Bypass the Water Heater

Never drain a hot water heater under pressure or while it's still hot. Allow to cool completely, then remove the drain plug or anode rod. If your RV has a bypass valve, turn it to the bypass position now. This will prevent you from using litres of antifreeze in a tank that you don't need.

Drain Low Points, Faucets, and Appliances

Find the low point drain lines under your RV. Typically, there is 1 hot water and 1 cold water. Open both and allow them to dry.

Next, turn on all faucets in the camper, including the outdoor shower if you have one. Keep each open during air or antifreeze flow.

Fill with RV Antifreeze as per Owner's Manual

When the lines are empty, cover the remaining contents with propylene glycol antifreeze. It is the only one that is rated safe for drinking water systems. Never approach a potable system with automotive antifreeze, which contains ethylene glycol, a poisonous chemical.

Attach the pump converter kit and run the antifreeze through the lines. Continue until pink water is seen at all faucets. This will depend on the size of the RV. Look at your manual, not a general chart.

Don't dump leftover antifreeze on the ground or down a storm drain. Do not put it in waterways; take it to a household hazardous waste facility.

Cover P-Traps, Toilets, and Outside Connections

Fill each sink and shower drain with antifreeze. This will help keep the P-traps from freezing. Repeat in the toilet bowl.

Last but not least, inspect exterior water connections. Cover the city water inlet to keep insects and debris out.

Is There a Difference in Winterizing for Each Type of Camper?

Learning how to winterize an RV camper means knowing your specific rig. Not all campers require the same level of effort. The compact van and the full-size fifth wheel follow the same basic steps. It's just a different scale.

Camper Vans and Compact Water Systems

Figuring out how to winterize a camper van is usually faster. Smaller rigs, such as camper vans, have less plumbing and fewer drain points. The job is done faster, and typically requires only 1 to 2 litres of antifreeze. However, do not miss any steps.

Travel Trailers, Fifth Wheels, and Motorhomes

If you are figuring out how to winterize a camper trailer or larger unit, it will have more complicated plumbing and may include slide-out rooms and its own water lines. Be prepared to use several litres of antifreeze and inspect several drains. Slow down on larger rigs.

What Are the Steps to Take to Prepare the Exterior and Chassis?

After the plumbing is finished, go outside. A few hours on the roof, tires, and paint can save a larger repair bill later.

Inspect Roof, Seals, Windows, and Awnings

A small problem in October is a cracked seam of roof sealant. By March, it can mean a wet subfloor. In fact, one of the most common causes of RV water damage is failure of the roof seal.

Inspect the roof for bubbling, cracking, or chalky areas by walking the roof. Seal any openings around vents and seams with sealant designed for your roof type. Look at the window and door seals as well.

Inspect Tires, Levelling, and Weight Distribution

Tire pressure decreases about 1 to 2 PSI for every 10°F decrease in temperature. This is approximately every 5 to 6°C. A tire that is inflated correctly in September may be underinflated in January. Check the cold pressure, and inflate to the manufacturer's recommended pressure.

If possible, place the RV on blocks. This relieves pressure from the tires and prevents flat spots.

Wash and Cover the Exterior of the Camper

Wash the outside thoroughly before storing. Dirt and grime on the surface can hold moisture against the paint and seals. A breathable RV cover is much more effective than a plastic tarp that will collect condensation under the cover.

What Are the Steps to Preparing the Battery and Electrical System?

Batteries don't like cold weather. With a little care, your power system is ready for spring.

Disconnect, Charge, or Maintain the House Battery

Lead-acid batteries lose capacity rapidly in cold weather. At approximately 0°C, a battery can store approximately 70-80% of its rated charge. In very cold conditions, available capacity drops further, which is why keeping the battery charged and protected is critical.

A battery that is significantly discharged can freeze around -10°C. A battery that is charged above 50% remains safe well below that level. Do not let it die out, or move it to an indoor, cool, dry location.

Protect Batteries From Unsafe Charging Temperatures

Without built-in low‑temperature protection, charging most lithium batteries in freezing temperatures can result in permanent damage. Many modern lithium batteries include a battery management system with low-temperature charging protection, but the exact operating limits depend on the battery model. Check the manufacturer's specifications before charging in freezing temperatures. If it does not support cold-temperature charging, wait until warmer weather before topping it up.

Get Portable Power Equipment Ready for Storage

Store portable power stations or solar panels at moderate temperatures, too. Always check the charge level first, as the pack may lose capacity during the winter. A quick top-up every few weeks keeps things healthy.

What is the Best Power Setup for Winter Storage and Travel?

After mechanical work, consider power. This is the case whether you're storing your rig or camping during the winter. The right setup enables that work, not taking the place of it.

Portable Power for Battery Maintenance and Winterizing Tools

The blowout method is easier to run with reliable power available. So is running a shop light while you inspect the roof. When there is no shore power, a reliable camping power supply is a lifesaver for most. It can also help power inspection lights, battery chargers, and essential campsite electronics during winter travel.

A small trickle charger can also be powered by a portable power station. This maintains your house battery charged.

RV5 for an Integrated Active Winter RV System

Rigged up and camping all season rather than storing? The BLUETTI RV5 is built for exactly this kind of setup. It provides up to 5,000W of continuous AC power. This is enough to operate a heater, microwave, & other appliances simultaneously. It can be charged using solar, the campervan's alternator, or shore power.

It has a LiFePO₄ battery that is designed for reliable winter RV power when operated within its specified temperature limits.

Elite 300 and Charger 2 for Portable Winter Travel Power

For RV owners who need portable winter power without running a fuel generator, the Elite 300 provides high-capacity battery storage with RV-ready connectivity. The BLUETTI Elite 300 has 3,014Wh of capacity for shorter winter trips. It also has a TT-30 RV-ready outlet, so you can plug straight into your camper.

Use it with the BLUETTI Charger 2. It can draw up to 1,200W from your car's alternator and solar panels simultaneously. That allows you to charge up fast between campsites.

What These Systems Can't Replace During Winterization

None of these products is a substitute for the mechanical work discussed above. They will not drain your plumbing or protect it from antifreeze. They also will not seal the roof or handle propane. Consider them as a supplement to your power requirements, not a replacement for the checklist.

Propane and Fuel Storage for Winter

Propane is a normal part of RV life, but it must be handled with care when storing it. Shut all valves and check for the telltale rotten-egg odour of a leak.

Store tanks upright and at least 1 meter away from doorways, windows, or other openings in buildings. Air intakes and ignition sources need more space, at least 3 meters, under Canadian codes. Do not store tanks in buildings.

Do not use a fuel generator, propane heater, or barbecue in the camper. This is true whether it is stored or used during the winter. Carbon monoxide is a colourless, odorless gas that can accumulate rapidly in a closed area.

It's also a leading cause of accidental poisoning in Canada. Install a working CO detector and test regularly as recommended by Health Canada — many manufacturers specify monthly.

How to Prevent Moisture, Mould, and Pests?

Damage from moisture and pests will not be apparent until spring. With a few simple steps, your camper will stay dry, clean, and rodent-free.

Clean Food and Fabric Storage Areas

Before closing up, take out all food, even dry food, and even toothpaste. Remove cushions, mattresses, and curtains as well, as they retain moisture and attract pests.

Use Ventilation & Moisture Control Safely

Keep cupboard doors and the fridge door open. That's crucial to allow air to flow. Next are the moisture-absorbing packets. Keep them in closets and cabinets. Note one thing if the storage area is powered. Here, use a dehumidifier for several days prior to storage. It is noticeable by spring.

Use steel wool and caulk to seal gaps. This is mainly around plumbing, wiring, or underbelly. Those are typical mouse entry points. Peppermint oil on cotton balls near openings can help deter rodents, too.

If possible, visit your RV every few weeks. Preventing costly problems is done through early detection.

Your Final Winterization Checklist at a Glance

• Plumbing: Fresh water tank emptied, grey and black water tanks emptied, low points opened, antifreeze added.

• Water heater: Cooled, drained, bypass valve on.

• Appliances: Outdoor shower, toilet, and washer lines protected.

• Exterior: Roof sealant checked, seals inspected, awning secured, breathable cover fitted

• Tires: Pressure checked cold, RV lifted or blocked if possible

• Battery: Charged or removed, stored in a cool, dry place, maintenance charging scheduled

• Propane: Valves closed, connections checked for leaks

• Moisture and pests: Fabrics removed, doors propped open, entry points sealed

Spring is the Time to Get the Camper Ready Again

Put the water heater bypass valve back into its normal position and replace the drain plug. Fill the freshwater tank and turn on all faucets until the water is clear. This will take a few minutes for each fixture.

Many owners then sanitize the tank with a mild bleach solution before a final flush. The standard ratio is 60 mL of bleach for every 57 litres of tank capacity. This is about 1/4 cup for every 15 gallons. Allow to sit, then drain and rinse with clean water.

Reinstall or reconnect the battery and ensure it is fully charged. Test the CO detector and check roof seals for winter damage. Recheck tire pressure before the first trip.

Use the Checklist, and Trust Your Owner's Manual

Winterizing a camper is not a huge task; it's a series of small, careful steps. Do the plumbing first, then the outside, then the battery and propane systems. Complete with moisture and pest control.

Always refer to your RV's owner's manual. The layouts vary from model to model. Be patient and go through the checklist. Your camper will appreciate you for a smooth start come spring.

Frequently Asked Questions

At what temperature should I winterize my camper?

Most Canadian RVers winterize when the overnight lows begin to fall into the 0°C range. That's well before a hard freeze sets in. If left too long, the water may freeze in the lines.

Can you winterize a camper without RV antifreeze?

Yes, some owners do use the compressed air blowout method. Many mix it with a bit of antifreeze at low points and P-traps for added protection. Refer to the owner's manual to determine which one is suitable for your plumbing.

Should I remove the RV battery for winter storage?

This will depend on the type of battery and where it is stored. Lead-acid batteries are best stored in a cool, dry place. Built-in protection lithium batteries are not the same. They can remain in the RV as long as it does not get below 0°C.

What is the time required to winterize a camper?

A simple camper van could take an hour or two. A larger trailer or motorhome can take half a day. Slow is good the first time, as rushing is how steps get missed.

What is the difference between winterizing a camper and using it in winter?

Winterizing involves closing all water systems and storing them for months. Those systems are used during the winter when camping. It's not about drained lines; it's about heated hoses, insulation, and consistent battery power.