40 Gallon, Medium, Electric Water Heater, 6,000W, 240V, Electronic Thermostat, Has No Mechanical Parts To Wear Out, Dual 4500W Heating Elements, Lower Incoloy Element Optimizes Efficiency, Self Cleaning Tank, Pex Dip Tube Helps Maintain Efficiency, Glass Lined Tank With Heavy Duty Anode Rod Protects Against Corrosion, Non-CFC Foam Insulation Saves Energy, Factory Installed Pex Polymer Lined Heat Trap Nipples, Factory Installed Temperature & Pressure Relief Valve, Water Connection Is Located At The Top Of The Tank, Water Connection Size: 3/4", Rated Storage Volume: 37, First Hour Rating: 51 Gallons, UEF: 0.92, EF: 0.95, Unit Dimensions: 50"H x 20 1/2"D, 9 Year Limited Tank & Parts Warranty, 1 Year Labor Warranty.