RV water heater anode rod. This exclusive anode rod absorbs corrosive elements caused by hot water and helps prolong the life of your water heater tank. Once the anode rod is depleted, the tank may begin to rust, crack, fail, and leak. Did you know that the anode rod inside your hot water tank can contribute to the production of hydrogen sulfide gas, which causes a rotten egg smell? This aluminum zinc alloy sacrificial anode rod is designed to help reduce this odor. The RV anode rod is made of high-quality aluminum zinc alloy, measures 9.25 inches in length, features standard inch threads, and requires a 1-1/16 inch socket for installation. It fits most RV water heaters including A.O. Smith, Rheem, Richmond, State, and other brands that use standard inch NPT anode rod connections. It is recommended to inspect the anode rod annually and replace it when more than 6 inches of core wire is exposed at either end. Pack of 2: Includes 2 aluminum zinc anode rods and 1 piece of PTFE tape (color may vary). Always keep a spare anode rod on hand for maintenance. Color: Silver + black. Material: Aluminum zinc. Diameter: 19mm. Length: 9.25 inches (approximately 235mm). Package contents: 2 x Aluminum Zinc Anode Rods, 1 x PTFE tape. Note: The color of the item may vary slightly due to lighting and display settings. Measurement error allowance is +/- 1-3cm.