RV water heater anode rod. This anode rod helps absorb corrosive elements caused by hot water and extends the life of your water heater tank. When the anode rod is depleted, the tank may begin to rust, crack, fail, or leak. Did you know the anode rod in your hot water heater can contribute to hydrogen sulfide gas, which causes a rotten egg smell? This aluminum zinc alloy sacrificial anode rod is designed to help reduce unpleasant odors. The RV anode rod is made of aluminum and zinc, measures 9.25 inches in length, features standard NPT threads, and requires a 1-1/16 inch socket for installation. It fits most RV water heaters including models from A.O. Smith, Rheem, Richmond, State, and others that use a standard NPT anode rod connection. Inspect the anode rod annually and replace it when more than 6 inches of core wire is exposed at either end. Pack of 2 anode rods included. Use one and keep a spare for convenience. Color: Silver and black. Material: Aluminum zinc alloy. Diameter: 19mm. Length: 9.25 inches (approximately 235mm). Package includes: 2 x Aluminum Zinc Anode Rods, 1 x PTFE tape (color may vary). Other items not included. Note: Display lighting and screen settings may cause slight color variations. Measurement may vary by +/- 1-3cm.