Rheem PRO+E40 2 RH95 EC1 Tall Professional Classic Plus Series High Efficiency water Heater, 40-Gallon High performance and lower operating cost, Compliant with many electric utility incentive programs Rheum exclusive R-Tech (registered) anode rod provides long-lasting tank protection Electric junction box located above heating elements for easy installation Over-temperature protector cuts off power in excess temperature situations, Automatic thermostat keeps water at desired temperature This new Model number replaces the old Model number 83VR40-2