How to Dewinterize Your RV: A Complete Spring Checklist

I'll never forget my first attempt at dewinterizing an RV. It was spring 2009, and I was so eager to hit the road that I rushed through the process, skipping what I thought were "optional" steps.

Fast forward two days into our first camping trip, when my wife took a shower and was greeted by a blast of pink antifreeze-tinted water that ruined her favorite pajamas. The look she gave me could have frozen Lake Michigan in July.

That embarrassing mishap taught me a valuable lesson: there are no "optional" steps when it comes to properly dewinterizing your RV. After two decades in the RV industry and personally dewinterizing over a dozen different rigs (including that memorable first disaster), I've developed a foolproof system that ensures your camping season starts with clean water, functioning systems, and domestic tranquility.

As the winter months give way to warmer temperatures and camping dreams, it's time for the critical process of waking your RV from its winter hibernation.

This comprehensive guide will walk you through every step of the dewinterization process, recommend products that actually work, and help you avoid the mistakes I've made (and seen others make) over the years.

Why Half-Hearted Dewinterization Will Come Back to Haunt You

Before diving into the specific steps, let me share why proper dewinterization is so crucial—beyond just avoiding the wrath of a pink-water-showered spouse.

The $2,300 Lesson

My friend Mike considered himself an RV expert and thought dewinterization was "just removing some antifreeze." He skipped the sanitizing step, reasoning that the antifreeze was non-toxic, so a little residue wouldn't hurt.

Three weeks into his camping season, his entire family came down with stomach issues.

The culprit?

Bacteria that had developed in his fresh water system during storage and wasn't properly eliminated. The medical bills and ruined vacation cost him over $2,300—not to mention a year of ribbing from his camping buddies.

The Hidden Crack Catastrophe

Another camping friend, Sarah, didn't bother checking her RV's exterior and roof seals during dewinterization.

A small crack that developed during winter expanded with the spring temperature fluctuations. By the time she noticed the water damage inside, moisture had seeped into the walls, creating mold and structural damage that required $5,000 in repairs.

A five-minute inspection could have identified the crack when it was a simple $50 caulking job.

The Battery Replacement Cycle

I once met a gentleman at a campground who complained about having to replace his RV batteries every two years.

When I asked about his dewinterization process, he admitted he simply reconnected the batteries without checking their charge level or condition.

Years of partial charging and sulfation had significantly reduced their lifespan. With proper battery care during dewinterization, he could have doubled their useful life.

These real-world examples illustrate why proper dewinterization matters:

1. Protecting your investment: A thorough dewinterization process helps prevent damage to your RV's water system, appliances, and other components that could lead to expensive repairs.
2. Health and safety: Properly sanitizing your fresh water system ensures your drinking water is safe and free from harmful bacteria that may have developed during storage.
3. Early problem detection: The dewinterization process provides an opportunity to identify and address any issues that may have developed during winter storage before they become major problems on the road.
4. Performance optimization: Proper dewinterization ensures all systems function at their best when you're ready to camp.
5. Peace of mind: Knowing your RV has been properly prepared gives you confidence as you begin your camping season.

My Tried-and-True Approach to RV Dewinterization

Having helped thousands of RV owners prepare their rigs for the camping season (and fixed countless dewinterization mistakes), I've developed a systematic approach that ensures no critical steps are missed.

I believe in being thorough but efficient, addressing each system methodically while looking for potential issues that have developed during storage.

The key to successful dewinterization is understanding that it's not just about removing antifreeze from your water system—it's a complete revival of your RV after its winter hibernation. Let's break down this process into manageable steps.

The Step-by-Step Dewinterization Dance: Don't Skip Any Moves!

Now that you have the necessary tools and products, let's walk through the dewinterization process step by step.

I've organized this in the exact order I follow, which minimizes backtracking and ensures no critical steps are missed.

Step 1: The Exterior Once-Over (AKA "Find Problems While They're Still Small")

Before focusing on the water system, conduct a thorough exterior inspection. I once skipped this step and missed a small crack in my roof sealant that turned into a major leak during the first spring rainstorm.

1. Check for winter damage: Examine the roof, seals, and exterior walls for any cracks, separations, or damage that may have occurred during winter storage. Pay special attention to areas where snow might have accumulated.
2. Inspect the roof: Look for signs of damage or wear on the roof membrane, seals around vents, air conditioners, and other roof-mounted components. I use a small step ladder and walk the entire perimeter, then carefully check the roof itself if it's designed to support weight.
3. Check seams and sealants: Inspect all exterior seams and sealants for cracking or separation that could lead to water intrusion. The "pinch test" works well—gently pinch sealants to check for elasticity; if they're brittle or cracking, they need replacement.
4. Examine awnings: Deploy awnings to check for mold, tears, or mechanical issues that need addressing. I once stored my RV with a tiny pinhole in the awning that turned into a 3-foot tear over the winter as the material degraded.
5. Test exterior lights: Verify all exterior lights are functioning properly, replacing any burned-out bulbs. This is also a good time to check that your brake lights and turn signals work correctly.
6. Inspect tires: Check tire pressure, look for cracks or unusual wear patterns, and confirm the date codes indicate the tires are still within their safe service life (typically 5-7 years from manufacture regardless of tread condition).

Pro tip: Take photos of any issues you find so you can track them and verify repairs are holding up throughout the season.

Step 2: Battery Revival (Because Dead Batteries Ruin Camping Trips)

If you removed or disconnected your batteries for winter storage (which I strongly recommend), now is the time to reinstall and reconnect them.

I keep a dedicated "battery day" checklist in my phone because forgetting even one step here can lead to problems down the road.

1. Clean battery terminals: Remove any corrosion from terminals using a battery terminal cleaner or a baking soda and water solution. I keep an old toothbrush dedicated to this task—just don't accidentally put it back in your bathroom!
2. Check battery fluid levels: For non-sealed batteries, check and top up fluid levels with distilled water if necessary. I learned the importance of using distilled water after ruining a battery with tap water that contained minerals that damaged the cells.
3. Test battery charge: Use a multimeter to verify your batteries have adequate charge (12.6+ volts for a fully charged 12V battery). If they're below 12.4 volts, charge them before reinstalling.
4. Reconnect batteries: Connect the positive terminal first, then the negative, ensuring connections are tight but not overtightened. I use a marker to label my battery cables after once connecting them incorrectly and blowing a fuse.
5. Apply terminal protectant: Use a battery terminal protectant spray to prevent future corrosion. This simple step has extended the life of my battery connections significantly.

A quick story: My camping buddy Tom always skipped the battery terminal cleaning step, saying it was "unnecessary." After three years of progressively worsening electrical issues, he finally cleaned his severely corroded terminals—and suddenly his "faulty" power converter worked perfectly. The corrosion had been creating resistance that prevented proper charging all along.

Step 3: Flush the Pink Stuff (Getting the Antifreeze Out)

Now it's time to address the water system, which is the heart of the dewinterization process. This is where my wife's pink shower disaster occurred, so I'm particularly thorough with this step now!

1. Reinstall water filter(s): If you removed water filters during winterization, install new ones now (never reuse old filters after winter storage). This is a perfect time for fresh filters that will give you clean, great-tasting water all season.
2. Close all drain valves: Ensure all low-point drains, tank drains, and faucets are closed. I once spent 30 minutes trying to fill my fresh water tank before realizing the drain valve was still open—not my brightest moment.
3. Bypass water heater: If your water heater is bypassed (which it should be if properly winterized), leave it bypassed for now. We'll deal with the water heater separately.
4. Connect fresh water: Either connect to city water or fill your fresh water tank. I prefer using city water pressure for the initial flushing as it's more effective at pushing out the antifreeze.
5. Install hand pump: If using the Valterra hand pump, connect it to your city water inlet. This allows you to control the water pressure during flushing.
6. Flush antifreeze from lines: Turn on each faucet one at a time (hot and cold) until clear water runs through instead of pink antifreeze. Don't forget outside showers, toilet, and any other water outlets. I work systematically from the closest fixture to the furthest to ensure thorough flushing.
7. Flush toilet: Flush the toilet several times until clear water appears. Also check the toilet sprayer if your RV is equipped with one—it's often forgotten.
8. Check for leaks: As you flush each fixture, check for leaks that may have developed during winter storage. Pay special attention to connections and joints, as these are most likely to develop issues during temperature fluctuations.

Pro tip: Keep a small bucket handy to catch the pink water from each faucet rather than letting it go down the drain. This prevents antifreeze from entering your gray or black tanks, where it might affect sensor readings.

Step 4: Sanitize the System (Because Bacteria Love Winter Storage)

After flushing antifreeze from the system, it's important to sanitize. This step is non-negotiable in my book after seeing the consequences of skipping it.

1. Prepare sanitizing solution**: Follow the instructions on your Camco TastePURE Spring Fresh Water Cleaner & Deodorizer to prepare the proper solution. I measure carefully here—more is not better when it comes to sanitizing solutions.
2. Introduce solution to water system**: Either pour the solution into your fresh water tank or use the hand pump to introduce it through your city water connection. I prefer the hand pump method as it gives more control over the process.
3. Run water through all fixtures**: Turn on each faucet until you smell the sanitizing solution, then turn off. Don't forget any outside showers or rarely used fixtures. I once forgot the outside shower and wondered why it had a funky smell mid-season.
4. Let solution sit**: Allow the sanitizing solution to sit in your water system for the time specified on the product instructions (typically 4-12 hours). I usually do this overnight, starting the sanitizing process in the evening and finishing the next morning.
5. Flush system thoroughly**: After the recommended contact time, drain the system and flush with fresh water until all sanitizer odor is gone. This usually takes more water than you expect—be patient and thorough.

A word of caution from experience: Don't rush the final flushing step. My first time sanitizing, I thought the system was fully flushed after a quick rinse. The next morning, my coffee tasted like it had been brewed with swimming pool water. Not the best start to camping season!

Step 5: Water Heater Resurrection (Bringing Hot Water Back to Life)

Now it's time to get your water heater ready for use. This step requires attention to detail to prevent damage to this expensive component.

1. Check the anode rod: If your water heater has an anode rod, check it and replace if more than 75% depleted. This $20 part can save your $1,000+ water heater from premature failure.
2. Inspect pressure relief valve: Ensure the pressure relief valve is functioning properly by briefly lifting the lever and confirming water releases. Be careful—the water may be very hot if the heater has been operating.
3. Remove bypass: Turn the bypass valves to their normal position to allow water flow to the water heater. I label my bypass valves with "winter" and "summer" positions to avoid confusion.
4. Fill water heater: Open a hot water faucet to allow air to escape as the water heater fills. You'll hear gurgling and sputtering until a steady stream of water flows, indicating the heater is full.
5. Check for leaks: Inspect around the water heater for any signs of leakage, particularly at connection points and the pressure relief valve.
6. Reinstall drain plug: If you removed the drain plug during winterization, reinstall it with Teflon tape. Hand-tighten first, then give it a quarter turn with a wrench—overtightening can crack the fitting.

A cautionary tale: My neighbor once turned on his water heater before properly filling it, resulting in a burned-out heating element. This $30 mistake required a service call and new part, delaying their trip by two days. Always verify the water heater is full before turning it on!

Step 6: Appliance Check (Making Sure Everything Works)

With the water system addressed, turn your attention to appliances. I use a simple checklist and test each system methodically.

1. Refrigerator: Turn on the refrigerator, check that it cools properly on both LP and electric modes. I place a thermometer inside and check back in a few hours to verify it's reaching proper temperature.
2. Furnace: Test the furnace to ensure it ignites and produces heat. Listen for unusual noises that might indicate the blower motor needs attention.
3. Air conditioner: Run the air conditioner to verify proper operation. Check that air flow is strong and the temperature drops appropriately.
4. Water pump: Listen for unusual noises and check for proper pressure. A water pump that runs continuously indicates a leak somewhere in the system.
5. Water heater: Once filled, test on both LP and electric modes if applicable. Verify that hot water is produced within a reasonable time.
6. Stove/oven: Check that all burners ignite properly and the oven reaches temperature. I light each burner individually and watch for a steady blue flame.
7. Microwave: Test with a cup of water to ensure it heats properly. Also check the turntable for smooth operation.
8. Generator: If equipped, start and run the generator under load for at least 30 minutes. This helps burn off any condensation that may have formed during storage and verifies it can handle actual power demands.

My personal approach: I create a simple checklist in my phone and methodically test each system, making notes of anything that needs attention. This prevents overlooking less-used systems and provides a record I can reference if issues develop later.

Step 7: LP Gas System Safety Check (Because Propane Doesn't Forgive Mistakes)

The LP gas system requires special attention after winter storage. This is one area where I never take shortcuts—propane safety is too important.

1. Check for leaks: Apply soapy water to all LP connections and look for bubbles that indicate leaks. I use a spray bottle with dish soap and water for easy application.
2. Inspect LP lines: Look for cracks, damage, or signs of rodent chewing on LP lines. Mice seem particularly fond of the smell of propane and often damage lines during winter storage.
3. Test LP detector: Ensure your LP gas detector is functioning properly by pressing the test button. Replace batteries if needed—this is a life safety device that deserves fresh power.
4. Check LP regulator: Verify the regulator is not damaged and operates correctly. Look for cracks, corrosion, or signs of damage from freezing.
5. Fill LP tanks: If needed, fill LP tanks before your first trip. I always start the season with full tanks to avoid surprises.

A sobering reminder: A camping family I met experienced a serious propane leak after failing to check their system properly after winter storage. A mouse had chewed through a line, creating a dangerous situation that was fortunately caught before causing harm. Their story reinforced my commitment to thorough propane system checks.

Step 8: Interior Inspection and Preparation (The Final Touches)

Finally, prepare the interior of your RV for your first adventure:

1. Check for signs of pests: Look for evidence of rodents or insects that may have entered during storage. Check drawers, cabinets, and upholstery carefully.
2. Inspect for water damage: Check ceilings, walls, and floors for any signs of water intrusion during storage. Look for stains, soft spots, or discoloration.
3. Test smoke and CO detectors: Replace batteries and verify proper operation by pressing test buttons. Like LP detectors, these are life safety devices that deserve annual battery replacement.
4. Clean and restock: Clean the interior thoroughly and restock essential supplies. I keep a "first trip" checklist of items that don't stay in the RV during winter.
5. Check window and door seals: Ensure all seals are intact and functioning properly. Apply seal conditioner if needed to prevent drying and cracking.

My ritual: I always finish dewinterization by opening all windows for a few hours to air out the RV, then add a vase of fresh flowers as a symbolic welcome to the new camping season. It's a small touch that makes the RV feel like our vacation home rather than a stored vehicle.

The Dewinterization Arsenal: Tools and Products You'll Actually Need

Before starting the dewinterization process, gather these essential tools and products.

Trust me, having everything ready before you start will save you multiple trips to the store (I once made three separate hardware store runs in one dewinterization session—not my proudest moment).

1. Camco 40207 TastePURE Spring Fresh Water Cleaner & Deodorizer

This specialized cleaner is designed to remove stale odors and sanitize your RV's fresh water system after winter storage. Unlike household bleach, which can damage rubber seals and gaskets over time, TastePURE is formulated specifically for RV water systems.

I discovered this product after years of using diluted bleach solutions that left a lingering chlorine taste and gradually damaged my water system components. The first time I used TastePURE, the difference was immediately noticeable—no chemical taste, and my water smelled fresh rather than like a swimming pool.

Why It's Worth Every Penny:

• Effectively removes antifreeze residue and sanitizes in one step
• Won't damage rubber seals or plastic components like bleach can
• Eliminates unpleasant tastes and odors completely
• Easy to use with clear instructions even a novice can follow
• Biodegradable and environmentally friendly (important when you're dumping water at campgrounds)

The Minor Drawbacks:

• Slightly more expensive than household bleach alternatives
• Requires proper dilution for effectiveness (but the instructions are clear)

I've found that using a dedicated RV water system cleaner like TastePURE results in better-tasting water and provides peace of mind about system sanitization.

The extra few dollars spent on this product versus household alternatives is well worth the investment—especially when you consider the cost of replacing damaged water system components.

Buy Camco TastePURE Spring Fresh Water Cleaner & Deodorizer

2. Valterra P23507VP RV Antifreeze Hand Pump Kit

This hand pump allows you to easily remove any remaining antifreeze from your RV's water system. It connects to your city water inlet and lets you pump fresh water through the system to flush out the antifreeze.

I resisted buying a dedicated pump for years, trying to save money by using gravity and the RV's water pump to flush the system. The result was inconsistent flushing and antifreeze that lingered in certain parts of the system. After finally investing in this simple hand pump, I was amazed at how much more thorough and controlled the flushing process became.

Why It's a Game-Changer:

• Simple to install and operate, even for mechanical novices
• Doesn't require electricity (perfect for dewinterizing before hookups are available)
• Allows for controlled flushing of the system at your own pace
• Durable construction for multiple seasons of use
• Includes all necessary fittings so you're not hunting for adapters

The Small Downsides:

• Manual pumping can be time-consuming for larger RVs with extensive plumbing
• Requires some physical effort (though I consider it my spring camping workout)

While electric pumps are available, I prefer this manual option for its reliability and the control it provides during the flushing process. You can work at your own pace and easily monitor the water color as antifreeze is removed from the system.

Buy Valterra RV Antifreeze Hand Pump Kit

3. Camco 35953 Supreme Permanent Bypass Kit

If you don't already have a water heater bypass installed, this kit allows you to bypass your water heater during winterization and makes dewinterization more efficient. It's a one-time installation that pays dividends every season.

I learned about the importance of a water heater bypass the hard way. During my first winterization, I used six gallons of antifreeze because I didn't have a bypass installed—most of it went into filling the water heater unnecessarily. The next year, after installing this bypass kit, I used less than two gallons. The kit paid for itself in the first year.

Why It's Worth Installing:

• High-quality brass valves for durability that will outlast your RV
• Complete kit with all necessary components (no missing parts headaches)
• Clear instructions for installation that even a moderately handy person can follow
• Saves water and time during winterization/dewinterization processes
• Prevents antifreeze from entering your water heater (saving gallons of antifreeze)

The Only Drawbacks:

• Requires basic plumbing skills to install (though YouTube videos make it easier)
• One-time installation takes about 30-60 minutes

Either this Camco kit or the Valterra P23505LFVP Winterizing EZ Turn ByPass Kit (which features a lead-free design and easy-turn valve handles) is an excellent investment if your RV doesn't already have one installed. They simplify both winterization and dewinterization processes and help protect your water heater.

Buy Camco Supreme Permanent Bypass Kit

Troubleshooting: When Dewinterization Goes Sideways

Even with careful attention, you might encounter some challenges during dewinterization.

Here are solutions to the most common issues I've encountered:

Never-Ending Pink Water

If water remains pink-tinted after extensive flushing:

The Fix: Some antifreeze may be trapped in rarely used lines or dead ends in the plumbing. Continue flushing, paying special attention to any bypass valves that might be directing water away from certain fixtures. For stubborn cases, a second sanitizing treatment with TastePURE can help remove residual antifreeze.

I once spent two hours trying to clear pink water from my kitchen sink only to discover that the previous owner had installed an inline water filter that was full of antifreeze. Removing and replacing the filter solved the problem immediately.

Dry Faucets

If your water pump runs but no water flows:

The Solution: This typically indicates an airlock in the system. Open all faucets simultaneously and run the pump for 30-60 seconds. This often clears airlocks by allowing air to escape from multiple points. If the problem persists, check for closed valves or blockages in the water lines.

My friend's RV had this exact issue, and we discovered that a small piece of antifreeze residue had created a blockage at the pump intake. A simple cleaning solved the problem.

Water Leaks

When you discover water leaks after dewinterization:

The Fix: Winter temperatures can cause fittings to contract and expand, loosening connections. Tighten any leaking connections, but be careful not to overtighten plastic fittings (a common mistake that leads to cracked fittings). For persistent leaks, you may need to replace the fitting or seal. Pay special attention to water pump connections, which commonly develop leaks after winter storage.

I keep a small assortment of common fittings and seals in my RV toolkit specifically for addressing these spring surprises. It's saved numerous camping trips from being cut short due to leaks.

Smells

Even after sanitizing, taste or odor issues can persist in your water system:

The Solution: A second treatment with TastePURE often resolves this issue. For stubborn cases, consider installing an activated carbon filter in your water system. The Camco TastePURE Water Filter with Flexible Hose Protector is an excellent option that removes chlorine, sediment, and bad tastes.

After purchasing a used RV, I battled a persistent musty water odor that wouldn't go away despite multiple sanitizing treatments. The solution turned out to be replacing all the water lines—an extreme measure, but sometimes necessary for older RVs with years of biofilm buildup.

The Dewinterization Timeline: A Realistic Schedule

For optimal results, follow this timeline for dewinterization. I've refined this schedule over years of preparing RVs for spring:

2-4 Weeks Before First Trip

• Perform exterior inspection (allows time to order parts and make repairs)
• Reconnect and check batteries (gives time for proper charging)
• Flush water system and sanitize (allows thorough treatment and flushing)
• Check for leaks and address any issues (prevents last-minute emergencies)

1 Week Before First Trip

• Test all appliances (ensures everything is working properly)
• Check LP gas system (allows time to address any issues safely)
• Perform interior inspection (gives you time to clean and make repairs)
• Verify all systems are functioning properly (peace of mind before departure)

Day Before Departure

• Fill fresh water tank with clean water (ensures freshest water possible)
• Check tire pressure (critical for safety and fuel efficiency)
• Perform final systems check (catches any last-minute issues)
• Stock RV with necessary supplies (prevents forgotten essentials)

I learned the importance of this timeline the hard way after once trying to dewinterize the morning of a planned departure. What should have been a 4-hour process stretched to 8 hours when I discovered a cracked water fitting that needed replacement. We arrived at our destination well after dark, stressed and exhausted—a situation easily prevented with better planning.

Final Thoughts: The Dewinterization Mindset

Properly dewinterizing your RV is an essential spring ritual that protects your investment and ensures trouble-free camping throughout the season.

By following this comprehensive checklist and using quality products like the Camco TastePURE Spring Fresh Water Cleaner, Valterra Hand Pump Kit, and appropriate bypass kits, you'll have your RV ready for adventure in no time.

Remember that thorough dewinterization is not just about removing antifreeze—it's a complete revival of all your RV's systems after winter storage. Taking the time to properly complete each step will pay dividends in reliable performance throughout your camping season.

I approach dewinterization not as a chore but as the official start of camping season—a ritual that connects me to my RV and prepares both of us for the adventures ahead. With each system I check and prepare, I'm mentally planning the trips we'll take and the memories we'll make.

If you're unsure about any aspect of the dewinterization process, don't hesitate to consult your RV's manual or seek professional assistance. The small investment in proper dewinterization is insignificant compared to the potential cost of repairs from improperly maintained systems—or the cost of pink-stained pajamas and an unhappy spouse!

Here's to a great camping season ahead in your properly dewinterized RV!

About the Author

I’m Bill Rowell, the founder of RVupgrades.com. In 2002, I launched the business to help fellow RV enthusiasts find unique and hard-to-find products. Over the years, it’s grown to offer more than 15,000 items, with a warehouse in Eastlake, Ohio. Having owned and repaired nearly every type of RV, I bring over two decades of hands-on experience to the table. For me, this isn’t just a business—it’s a passion and a way of life that I love sharing with the RV community.

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