● SUS444 white gold liner, no need for anode rod protection ● It has triple protection with thermostat, high temperature limit and temperature and pressure safety valve ● Adjustable range of 49-82℃ ● Rated working pressure 1.1MPa ●50mm thick fluorine-free polyurethane insulation layer ● In-immersed thread type INCOLOY electric heating elements ● High-quality brass drain valve ● Highly sensitive temperature controller, automatic control of operation ●T&P safety valve ● National level 1 energy efficiency ● The liner is guaranteed for six years, and the parts are guaranteed for one year