How to De-Winterize Your RV: A Step-by-Step Spring Checklist
- Joe Stanford
- Jun 21
- 6 min read
Camping season's calling, and if your rig spent the winter tucked away, you can't just hook up and roll out — there's a little waking-up process first. It's called de-winterizing, and it's how you undo everything you did to protect your camper from the cold and get it safe and ready for the road. If you're a newer owner staring at your rig wondering where to even start, don't worry. I'll walk you through the whole thing.
I'm Joe — Squatch to most folks — and today on Camping with Squatch we're going step by step through how to de-winterize your RV. Whether you're right on time or you're one of the stragglers just now getting to it (no judgment — life happens), this checklist gets you from "stored for winter" to "ready to camp" without missing the stuff that matters. Let's wake this rig up.
New to the RV life? Don't go it alone. This post lives inside my RV Beginners Guide, where I've rounded up everything I wish someone had handed me on day one.
Quick Refresher: What Did Winterizing Even Do?
To de-winterize, it helps to remember what winterizing did in the first place. To keep water from freezing and cracking your pipes over the cold months, you (or whoever stored it) either ran RV antifreeze through the plumbing or blew the lines out with air, bypassed the water heater, and drained the tanks. De-winterizing is basically reversing all that — plus doing a good spring once-over, because sitting all winter is hard on a camper. Let's do it in order.
Step 1: Flush Out the Antifreeze
If your rig was winterized with the pink RV antifreeze, job one is getting it all out.
If any antifreeze was added to the fresh water tank, drain it.
Hook up to water, then open every faucet — hot and cold — and run them until the water runs completely clear with no pink tint. Don't forget the shower, the outside shower, and the toilet.
Flush the fresh water tank by filling and draining it.
Run it all until you don't see (or smell) any more pink. That stuff is non-toxic, but nobody wants antifreeze-flavored coffee.
Step 2: Take the Water Heater Out of Bypass
Over winter, your water heater was almost certainly put in bypass mode so antifreeze didn't fill it (that'd waste a lot of pink).
Return the bypass valves to their normal position so water flows through the heater again.
If the drain plug or anode rod was removed, reinstall it (and if you've got a Suburban-brand heater with an anode rod, check its condition — a heavily worn one should be replaced).
Let the water heater tank completely fill with water BEFORE you turn it on. This is critical — firing up a dry water heater can wreck it. Open a hot faucet and wait for a steady stream before you ever hit the switch.
Step 3: Sanitize the Fresh Water System (Don't Skip This)
Your water system sat stagnant for months, which is a party invitation for bacteria and mildew. Sanitizing makes your water safe to drink again.
Mix a bleach-and-water solution — a common guideline is about a quarter cup of household bleach per 15 gallons of fresh tank capacity, diluted in water first, then added to the tank.
Fill the fresh tank, then run every faucet until you smell bleach at each one.
Let it sit several hours (overnight is great).
Then drain it all and flush thoroughly with fresh water until the bleach smell is gone.
Yes, it's a little tedious. Yes, you want to do it. Your stomach will thank you.
Step 4: Check for Leaks
Freezing is brutal on plumbing, so once your system's full and pressurized (pump on or hooked to city water), go hunting for leaks. Check under every sink, around the water heater, behind the toilet, and at every connection you can reach. A cracked fitting or line from a missed winterization spot shows up right here — far better to find it in your driveway than soaking your floor on the road.
Step 5: Wake Up the Propane System
Open your propane and check the connections for leaks (a little soapy water at the fittings will bubble if there's a leak).
Test each propane appliance: the stove, furnace, water heater, and the fridge on propane mode. Make sure everything lights and runs.
Step 6: Tend to the Batteries
If you pulled your batteries for winter storage, reinstall them now. Either way:
Check the charge and top them up.
For flooded lead-acid, check the water levels.
Clean any corrosion off the terminals.
(If your batteries didn't survive the winter or you're thinking about an upgrade, my [RV batteries] post breaks down lead-acid vs. lithium.)
Step 7: Inspect the Tires
Tires lose pressure sitting all winter and can develop dry rot or flat spots.
Air them all up to the proper pressure (check that spare too).
Look closely for cracks, dry rot, or bulges. Remember, RV tires age out before they wear out.
Step 8: Check the Roof, Seals, and Seams
Winter weather is rough on sealants, and this is where leaks are born.
Get up top (safely, on a walkable roof) or have someone inspect the roof, vents, seams, and around windows for any cracks, gaps, or separation.
Reseal anything questionable before it lets water in. Catching this now saves you from soft floors and expensive water damage later.
Step 9: Look for Winter Critter Damage
Here's one new owners forget: mice and bugs love a quiet stored camper. Check for nests, droppings, and chewed wires in cabinets, storage bays, and around the water heater and furnace. (If you find evidence of squatters — the rodent kind, not me — my post on [keeping mice out of your RV] will help you evict them and seal up for next time.)
Step 10: Test Everything Electrical and Safety
Plug into shore power and test the outlets, lights, air conditioner, and appliances.
Operate your slide-outs and awning; inspect the awning fabric and lubricate where needed.
Test your smoke, carbon monoxide, and propane (LP) detectors and replace the batteries. Note that these detectors expire — if yours are more than 5–7 years old, replace them.
Confirm your fire extinguisher is charged.
Step 11: Clean Her Up and Restock
Almost there. Give your rig a good wash to knock off the winter grime (my [how to wash an RV] post has you covered on doing it right), wipe down the interior, restock your supplies, and toss anything that expired in storage. Now she's ready.
Squatch Tips: De-Winterize Your RV the Easy Way
Here's what I tell folks tackling this for the first time:
Go in order and don't rush the water heater. Filling it before powering it on is the one step that, if skipped, gets expensive fast. Patience here pays.
Always sanitize. I know it's tempting to skip when you're itching to camp, but stagnant winter water is genuinely worth cleaning out. Do it once and you'll never question it.
Treat de-winterizing as your spring inspection too. You've got the rig open and you're poking around anyway — it's the perfect time to catch seal, tire, and critter issues before your first trip.
Write down what you did to winterize. Next fall, a quick note on which lines you treated and whether you used antifreeze or air makes both jobs way easier. Future-you is grateful.
Not sure? Do your first one with help. Have a buddy who's done it, or your dealer's service folks, walk you through round one. After that you've got it.
That's the heart of Camping with Squatch — turning the intimidating seasonal stuff into a simple routine so you can get back to the fun part: camping.
Print This: RV De-Winterizing Checklist
Tape it inside a cabinet for spring startup.
Water System
[ ] Drain antifreeze from fresh tank (if added)
[ ] Run all faucets (hot & cold), toilet, showers until water runs clear
[ ] Flush the fresh water tank
[ ] Return water heater to normal (out of bypass); reinstall plug/anode
[ ] Fill water heater BEFORE powering it on
[ ] Sanitize the fresh system with bleach solution, let sit, flush clean
[ ] Pressurize and check everywhere for leaks
Systems
[ ] Open propane; leak-check connections; test all gas appliances
[ ] Reinstall/charge batteries; check water (flooded); clean terminals
[ ] Air up all tires (+ spare); inspect for cracks/dry rot/flat spots
[ ] Test shore power, outlets, lights, AC, appliances
[ ] Operate slides and awning; inspect awning
Inspection
[ ] Roof, seals, seams, windows — check and reseal as needed
[ ] Check for mouse nests, droppings, chewed wires
[ ] Test smoke, CO & LP detectors; replace batteries (and old detectors)
[ ] Fire extinguisher charged
Finish
[ ] Wash exterior and clean interior
[ ] Restock supplies; toss expired items
[ ] Note your winterizing method for next fall
Time to Make Some Memories
De-winterizing isn't hard — it's just a sequence of small, smart steps that turn your stored rig back into an adventure machine. Take your time, go in order, use the checklist, and treat it as your spring tune-up. Do it right and your first trip of the season starts smooth instead of stranded.
And if you hit something that doesn't look right — a stubborn leak, a seal you're unsure about, or you just want a second set of eyes before the season — come find me at A&L RV Sales in Christiana, just outside Murfreesboro. Give me a call or text at 615-653-7561, or follow along with Camping with Squatch for more straight talk through every season. No pressure, ever — I just want you out there camping happy.
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