... certification 4.Best price with high quality Pressurized Solar Water Heater.1,vacuum tube length:47/1500mm,58/18002,vacuum ... 5mm thickness galvanized steel material4,P/T relief valve ,electrical heater element with terminator5,Heat exchanger:20m long,12mm diameter, ... in good style .5,Tank is equipped with electric water heater setting,automatic temperature controller.6,With increased anode magnesium ...