The Rheem Anode Rod/Cap Assembly measures 0.700 inches in diameter and 22.25 inches in length, designed to protect your water heater from corrosion. This essential component helps extend the lifespan of your water heater by attracting corrosive elements, ensuring the tank remains intact. Made from high-quality materials, it is easy to install and compatible with various Rheem models. Regular replacement of the anode rod is crucial for maintaining optimal performance and efficiency in your water heating system, adhering to industry standards for safety and reliability.