Heavy Duty Electric Tank-Type Water Heaters--------------------------------------------------------------------------------Available Capacities:6 KW - 81 KWAvailable Warranties:3 year limited tank warranty--------------------------------------------------------------------------------Features:System Sentinel L.E.D. diagnostic system Surface mounted and immersion thermostat models available Lifeguard stainless steel elements 208, 240, 277 and 480 voltages Manual reset high limit control Magnetic contactors and integral fusing Hot outlet and cold inlet are 1-1/2" NPT dielectric nipples which prevent excessive turbulence of heated water and results in optimum tank draw. 3" Rigid foam insulation. Heavy duty anode rods Full port, full blow, brass drain valve Factory Installed AGA/ASME rated Temperature and Pressure relief valve