Camco RV Anode Rod with Drain is a patented magnesium anode rod for aluminum water heaters (Atwood style). It preserves the life of your water heater by corroding itself so your water heater tank doesn't. Replace your 1/2" pipe thread drain plug with the Camco RV Water Heater Anode Rod to extend the life of your RV’s water heater. This Anode rod features an internal drain va...