Drain Frost Protection for RV Tankless Water Heater

To prevent freezing damage in winter, your RV tankless water heater—and the entire water system—needs to be properly drained and protected before cold weather hits.

🔧 Why is frost protection important?
· Frozen water expands and can cause pipes, tanks, and your heater to crack or burst.
· These damages are costly and often not covered by warranty.
· It's not just about the heater—your entire plumbing system needs protection.

📍 Quick Drainage Steps:
1️⃣ Turn off the power and open the faucet to release any remaining hot water.
2️⃣ Pressure release & drain:
▪️Open the pressure relief valve.
▪️Unscrew the pre-filter and let the water drain out.（For faster, cleaner draining, use compressed air.）
▪️Tighten the pre-filter and close the relief valve after draining.

3️⃣ Restart after draining:
▪️ Open the water valve and check for leaks.
▪️ Open the gas valve and test for gas leaks with soapy water.
Turn the power back on.

✅ Reminder: Freeze cracks often appear as long, outward-expanding lines—a clear sign of ice damage.

Make frost protection part of your RV winterizing routine to keep your plumbing safe and your adventures worry-free!

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