● SUS444/316L white gold liner, no need for anode rod protection ●49-82℃ adjustable temperature ● It has triple protection with thermostat, high temperature limit and temperature and pressure safety valve ● Rated working pressure 1.1MPa ● High-quality brass drain valve ●50mm thick fluorine-free polyurethane insulation ● In-immersed thread type INCOLOY electric heating elements ●T&P safety valve ● Highly sensitive temperature controller, automatic control of operation ● The liner is guaranteed for six years, and the parts are guaranteed for one year