The Rheem Anode Rod AP11525BC-2 is a magnesium anode rod measuring 0.840 inches in diameter and 30-3/8 inches long. This essential component helps prevent corrosion in your water heater tank, extending its lifespan and maintaining efficiency. Constructed from high-quality magnesium, it effectively protects against rust and degradation. Designed for compatibility with various Rheem models, this anode rod is easy to install and replace. Regular maintenance with this anode rod ensures optimal performance and longevity of your water heating system.