Most tank-style RV water heaters work in demanding conditions. Hard water can leave calcium, magnesium and other mineral deposits behind, while the steel tank remains vulnerable to corrosion.
The small part designed to wear out
Many RV water heaters use a sacrificial anode rod. The rod is designed to corrode before the steel tank does. Once it is heavily depleted, the tank loses that protection and corrosion can accelerate.
What routine maintenance should include
- Inspect the anode rod and replace it when it is substantially consumed.
- Flush sediment and mineral buildup from the tank.
- Check the drain opening, pressure-relief valve and nearby fittings for leaks.
- Use the replacement part and maintenance procedure specified for your water-heater model.
Why this matters
An anode rod is a maintenance item. A corroded or leaking water-heater tank can require replacement of the complete appliance. Regular inspection is a practical way to catch the inexpensive problem before it becomes the expensive one.
If you are unsure what type of water heater your RV has, send a photo of its data plate or exterior access compartment before scheduling service.
Learn about RV water-heater service →