If freezing temperatures are on the horizon, preparing your RV’s plumbing is crucial. Learning how to winterize your RV water system the right way helps prevent cracked pipes, busted fittings, and expensive repairs. Even if you’re not in extreme climates, it’s a vital seasonal step for RV longevity.
Why Winterizing Matters
Water expands when it freezes. In an RV, this can rupture:
- Water lines
- Faucets
- Water heater tanks
- Plastic elbows and connectors
The result? Massive leaks, mold, and even structural damage. Winterizing ensures your plumbing survives until spring—especially if your RV is in storage.
What You’ll Need
- Non-toxic RV antifreeze (usually 2–3 gallons)
- Water pump converter kit or hand pump
- Socket wrench (for draining the water heater)
- Bypass kit (if your RV doesn’t already have one)
- Towel and bucket for mess control
Daisy RV offers complete winterization packages if you’d rather let a pro handle it.
Step-by-Step: How to Winterize Your RV Water System
1. Drain the Water System
- Turn off water heater and let it cool
- Open all faucets and low-point drains
- Remove the drain plug on the water heater
- Flush toilet and shower to remove trapped water
2. Bypass the Water Heater
- Use your RV’s built-in bypass valves
- This keeps antifreeze from filling the heater unnecessarily
3. Pump Antifreeze Through the System
- Connect a water pump converter kit or hand pump
- Draw in antifreeze until it comes out of each faucet (hot and cold)
- Don’t forget outside showers, city water inlets, and toilet flush valve
- Run antifreeze through washer/dryer connections (if equipped)
4. Pour Antifreeze Into Traps
- Add 1–2 cups to each drain (sink, shower)
- Pour a bit into the toilet bowl and flush so it gets into the black tank
Final Winterizing Tips
- Label all bypass valves so you can reverse in spring
- Store with all faucets open to release pressure
- Keep antifreeze in the lines until dewinterizing
- Check for leaks during the process—now’s the time to fix them
If this sounds like too much hassle, let Daisy RV handle it for you with expert care and the proper equipment.
Don’t Risk Springtime Surprises
A few hours of prep can save you thousands in plumbing repairs. Whether you do it yourself or call in a pro, knowing how to winterize your RV water system the right way is essential to protecting your home on wheels.