Dual 4500 watt elements for faster recovery and reliable operation;Longer lasting Stainless steel lower element;Helps reduce lime and sediment buildup and maximizes hot water output. Made from long-lasting PEX cross-linked polymer;Eco-friendly non-CFC foam insulation, heat traps and other features combine to yield a higher Uniform Energy Factor that maximizes savings on operating costs;Our anode rods have a stainless steel core that extends the life of the anode rod allowing superior tank protection far longer than standard anode rods