Dual 4500 watt heating elements for faster recovery. Includes extra durable high temperature dip tube to meet the most stringent plumbing codes. Meets or exceeds National Appliance Energy Conservation Act (NAECA) requirements. Patented resistor design heating elements prolong anode rod and tank life. Tank protected by exclusive porcelain formula. Easy access thermostat adjustment. Rigid foam insulation for superior heat retention. Factory installed temperature and pressure relief valve. 6 year. 40 gallon capacity. Tank height 48-3/8”. Tank diameter 20-1/4”.