De-Winterizing Your RV & Prepping for Spring

As winter fades and travel season returns, it’s time to reverse the process you completed months ago. Dewinterizing your RV is an essential step to ensure your water systems, appliances, and overall setup are safe and ready for use.

If you properly winterized your RV, the good news is that dewinterizing is straightforward. With a little time and attention, you can get your camper or motorhome road-ready for spring and summer adventures.

In this guide, we’ll walk through exactly how to handle dewinterizing, what to check, and how to avoid common mistakes.

What Is Dewinterizing an RV?

Dewinterizing is the process of reversing winterization and preparing your RV’s systems for normal use again.

When you winterized your RV, you likely:

• Drained water systems + holding tanks
• Added antifreeze
• Shut down appliances

Dewinterizing involves:

• Flushing out antifreeze
• Refilling water systems
• Testing appliances
• Inspecting for damage

When Should You Dewinterize Your RV?

The best time to start dewinterizing your RV is when:

• Temperatures consistently stay above freezing
• You’re ready to begin traveling again
• There’s no risk of overnight frost

Starting too early can expose your system to freezing damage, so timing matters.

What You’ll Need for Dewinterizing

Before you begin, gather a few essential supplies:

Dewinterizing Checklist:

• Freshwater hose (drinking water safe)
• Water pressure regulator
• Bucket
• Basic tools
• Cleaning cloths
• Sanitizing solution (bleach or RV tank cleaner)

Having everything ready makes the dewinterizing process faster and easier.

Step-by-Step: How to Dewinterize Your RV

Follow these steps to properly complete the dewinterizing process.

Step 1: Inspect Your RV for Winter Damage

Before turning anything on, walk around your RV and check for:

• Cracked seals
• Damaged hoses
• Signs of leaks
• Roof or exterior damage

Even if you carefully handled winterizing your RV, winter weather can still cause wear and tear.

Step 2: Flush Out RV Antifreeze

When de-winterizing, the first goal is to ensure that all the antifreeze has been removed from the tanks. If you used non-toxic RV antifreeze (the only kind we recommend), begin by draining your holding tanks.

This step is different for each model and style of RV, so refer to your owner’s manual for more specific instructions. If you bypass your hot water heater, then be sure to switch it back to “normal." If you filled your water heater with antifreeze, then drain that as well.

Again, refer to your owner’s manual for how to drain the water heater, as it can differ depending on the model of hot water heater your RV is equipped with.

How to Flush the System:

1. Connect your RV to a freshwater source
2. Turn on the water pump or city water connection
3. Open each faucet (hot and cold) one at a time
4. Run water until it flows clear (no pink color)

Don’t forget:

• Shower
• Outdoor shower
• Toilet

This is one of the most important steps in dewinterizing.

Step 3: Sanitize the Tanks

The next step in de-winterizing will be to sanitize the tanks to ensure all the pipes and holding tanks are safe to drink from. This process can take up to twelve hours, so it’s best to ensure the RV isn’t in use during this time.

A general rule of thumb is to sanitize your water tanks every six months anyway, so it’s good to be well-versed in this step. Additionally, if your water tanks ever become contaminated, for instance, if non-potable water is accidentally used, then your tanks must also be sanitized. This would require less sanitation time than an RV water system that has had antifreeze in it.

Close all drains and ensure drain plugs are installed. This next step will require a little bit of math. You’ll need ¼ cup of bleach per every fifteen gallons. Do not use more bleach than recommended.

Add the total amount of bleach into a small amount of water in a bucket and then pour it into the fresh holding tank. Then turn your water pump back on and run all the hot and cold faucets, until it begins to smell like bleach, and then turn them off. Let the solution sit for twelve hours. Then drain all the water, like we did above, and refill with potable water.

Turn on the water pump and open all the hot and cold faucets. Continue flushing the lines until it no longer smells like bleach. Sometimes this step needs to be done a few times to ensure all the bleach is gone.

Step 4: Check for Leaks

Once your system is running:

• Inspect under sinks
• Check connections
• Look around the water heater

Catching leaks early prevents bigger problems later.

Step 5: Test All Appliances

Dewinterizing isn’t just about water, it’s about getting your entire RV ready.

Test:

• Water heater
• Air conditioner
• Furnace
• Refrigerator
• Stove

This ensures everything is functioning properly before your first trip.

Step 6: Inspect Tires and Exterior

Winter storage can affect your RV’s exterior.

Check:

• Tire pressure
• Tire condition (cracks or wear)
• Exterior seals and caulking
• Battery charge

These checks are an important part of completing the dewinterizing process.

Common Mistakes When Dewinterizing

Even experienced RVers can overlook key steps.

1. Turning on the Water Heater Too Soon: Always ensure the tank is full before powering it on.
2. Not Fully Flushing Antifreeze: Residual antifreeze can affect taste and system performance.
3. Skipping Sanitization: Even if your system looks clean, sanitizing helps ensure safe water.
4. Ignoring Small Leaks: Minor leaks can become major issues if left unaddressed.

How Long Does Dewinterizing Take?

Most RV owners can finish the initial dewinterizing in a couple of hours. Waiting for the tanks to finish sanitizing is the longest part, but it’s worth the wait!

Tips for a Smooth Spring RV Start

To make your first trip easier:

• Start dewinterizing a few days before travel
• Test systems at home or storage
• Stock your RV gradually
• Plan a short first trip

These steps help you ease back into RV travel.

Final Thoughts

Dewinterizing your RV is the final step in transitioning from winter storage to open-road adventure.

If you took the time to properly handle winterizing your RV, then dewinterizing is simply the process of bringing everything back to life.

With a careful flush, system check, and a bit of preparation, your RV will be ready for the season ahead and for many more memorable trips.