How does the anode rod work? Corrosion Protection: Extends the life of a water heater by attracting corrosive elements in the water. The exclusive suburban anode rod absorbs the corrosive action acused by hot water and prolongs the life of your water heater tank Reliable Quality?High quality rv hot water tank anode rods are a perfect replacement for suburban 232767 and Mor-Flo tank water heater anode rod Safety Comes First: RV water heater anode rods are made from superior quality, extra-durable magnesium .Our products are safe for the entire family Size and Material Typle: Magnesium anode rod, 9.25" long," threads , Uses a 1-1/16 socket Pack of 2: Unscerw the anode rod to drain the tank. If the rod is mostly eaten away, replace with a new one. Always keep a spare in your RV