Shaping the future--------------------------------------------------------------------------------Available Capacities:40, 50, 85, and 105 gallon modelsAvailable Warranties:Lifetime limited tank warranty: 6 year limited parts warranty--------------------------------------------------------------------------------Features:Seamless, blow-molded, polybutylene tank - impervious to rust and corrosion Multiple layers of filament wound fiberglass give the tank unmatched strength Polyurethane Envirofoam insulation helps reduce energy consumption The highest energy factors (EF) available! Pipe wrap energy saving kit included to achieve maximum energy savings Recessed drain valve is out of the way of brooms and scrubbers Tough molded polyethylene outer shell resists dents and scratches Bowl shaped bottom allows complete sediment draining High temperature polysulfone dip tubes Thermally fused upper element provides protection against "dry-firing" - stainless steel incoloy lower element for resistance to lime build-up Factory installed conduit between element control boxes All plastic tank eliminates the need for an anode rod Factory installed temperature and pressure relief valve Factory installed vacuum relief valve