2e05dfb7_Water_Heaters__Possible_Causes
[Problem] Rotten egg odor [Possible Repairs] Drain water heater Treat tank with hydrogen peroxide solution of 2 pints 3% peroxide to 40 gallons of water. Flush water lines with some of solution as well Leave solution in tank and pipes for 2 hours. (The peroxide solution is not toxic and no rinsing is needed) If odor persists, replace anode with a zinc-alloy anode Replace your water heater with a plastic lined tank unit should the offensive odor remain [Possible Causes] 
Bacteria buildup inside tank
Water Heaters
Possible Causes