This DIY repair guide explains how to replace the anode rod in an electric water heater. The anode rod helps prevent tank corrosion. Natural micro-organisms and sulfates that exist in some water can react to the aluminum or magnesium anode rods in the hot water tank, creating a rotten egg smell. If your hot water begins to smell bad, replace the anode rod with a less reactive zinc-aluminum rod to help combat the smell.
Use these steps to replace the anode rod in Kenmore, State, A. O. Smith, Rheem, Reliance and Whirlpool water heaters.