Prolongs the life of your water heater by protecting the tank from corrosive elements in water. The exclusive Suburban magnesium anode rod attracts and neutralizes corrosive substances in hot water, slowing tank corrosion and extending service life. Anode rods for Suburban RV water heaters are 9-1/4 inch long with 3/4 NPT connectors and fit most RV water heaters. Made of high quality magnesium. The rod absorbs oxidizing substances and impurities in water by electrolysis to itself, preventing rust on the metal water tank and supporting long-term use of your RV water heater. Performance and compatibility: - Function: sacrificial protection that extends tank life by reducing corrosion and rust. - Compatibility: designed for Suburban RV water heaters and most RV water heaters with 3/4 NPT connections. - Size: 9-1/4 inch length; 3/4 NPT connectors. - Material: magnesium. - Benefits: prolongs heater life, reduces maintenance, saves money and time. Use scenarios: - On long road trips or boondocking with hard water, install a new rod to minimize corrosion and avoid premature tank failure. - Seasonal use with unknown water quality: replace the rod to protect the tank. - After purchasing a used RV or replacing an old rod: install to extend hot water tank life and improve reliability.