One burst pipe can cause thousands of dollars in damage. If you live in a climate where temperatures drop below freezing, properly winterizing your RV is not optional—it's mandatory insurance against catastrophic repairs.

Whether you're storing your RV for the winter or planning to use it in freezing temps, this guide walks you through the complete winterization process.

When to Winterize Your RV

Winterize if:

• Storing the RV unused in freezing temperatures
• Temperatures will drop below 32°F (0°C) and the RV won't be heated 24/7
• You're done camping for the season

You don't need to winterize if:

• Winter camping with heat running continuously
• Storing in a heated garage
• In a climate where it never freezes

Supplies You'll Need

• RV antifreeze (non-toxic, propylene glycol-based): 2-3 gallons
• Water heater bypass kit (if not installed)
• Hand water pump or air compressor
• Wrenches and screwdrivers
• Bucket or drainage container
• Funnel

Step-by-Step Winterization Process

Step 1: Drain the Fresh Water System

1. Empty the fresh water tank completely using the drain valve
2. Open all hot and cold faucets (including outdoor shower if equipped)
3. Flush the toilet until the bowl is dry
4. Leave all faucets open during the process

Step 2: Drain and Bypass the Water Heater

1. Turn off water heater and let it cool completely (critical for safety)
2. Open the pressure relief valve
3. Remove the drain plug or open the petcock valve at the bottom of the heater
4. Let 6-10 gallons drain out (catch in a bucket if needed)
5. Close the water heater bypass valves so antifreeze doesn't fill the tank (saves 6-10 gallons of antifreeze)

Step 3: Drain Gray and Black Tanks

1. Drain both tanks completely at a dump station
2. Flush black tank thoroughly
3. Leave drain valves CLOSED after draining
4. Add a cup of RV antifreeze to each drain to protect the P-traps

Step 4: Blow Out Water Lines (Optional but Recommended)

Using compressed air removes most water before adding antifreeze, reducing the amount needed.

1. Connect air compressor to city water inlet using a blow-out plug
2. Set pressure to 30-40 PSI MAX (too much can damage plumbing)
3. Open one faucet at a time (hot then cold) until water stops spraying and only air comes out
4. Repeat for all faucets, shower, and outdoor connections

Step 5: Add RV Antifreeze to the System

1. Locate the water pump intake line (usually near fresh water tank)
2. Disconnect it from the tank and place it in a gallon jug of RV antifreeze
3. Turn on the water pump and open the closest faucet (cold/hot)
4. Wait until you see pink antifreeze flowing steadily, then close that faucet
5. Repeat for every faucet, shower, toilet, and outdoor shower in the RV
6. Pour 1 cup of antifreeze down each drain (sinks, shower, toilet)
7. Pour antifreeze into toilet bowl and flush to protect bowl seals

Step 6: Protect Other Systems

• Ice maker: Drain completely or add antifreeze to the line
• Washing machine: Run a cycle with antifreeze if equipped
• Water filters: Remove and store indoors to prevent cracking

Additional Winter Storage Tips

Exterior Protection

• Cover the RV: Use a breathable RV cover (not a tarp) to prevent UV damage and moisture buildup
• Tires: Inflate to max PSI and use tire covers. Place boards under tires to prevent flat-spotting
• Seal gaps: Cover vents, exhaust pipes, and openings with mesh or covers to prevent rodents

Interior Protection

• Climate control: Leave roof vents cracked slightly for air circulation
• Appliances: Leave refrigerator and freezer doors propped open to prevent mold
• Cabinets: Leave cabinet doors open for airflow
• Rodent prevention: Use dryer sheets, peppermint oil, or rodent repellent in cabinets

Battery & Propane

• Disconnect batteries or use a trickle charger/solar maintainer
• Turn off propane at the tank and disconnect if storing long-term

De-Winterizing in Spring

When it's time to use your RV again:

1. Close all drain valves
2. Reconnect water heater (close bypass valves)
3. Fill fresh water tank
4. Run water through all faucets until antifreeze smell/taste is gone
5. Sanitize the system with bleach solution
6. Flush again and refill with fresh water

Conclusion

Winterizing your RV takes 1-2 hours and costs about $30 in antifreeze. Skipping it can result in burst pipes, cracked fittings, and water heater rupture—repairs easily exceeding $5,000.

Follow this guide carefully each fall, and your RV will be ready to roll when spring arrives.