Pre-heat pressurized solar water heater 1. ISO 9001, CE, CCC; ... , 0.31-0.8mm thickness;2. Outer tank: SUS304, SUS202, Colored steel, 0.31-0.6mm thickness:3. Copper coil: Diameter ... 58-24242503.745-6JH-PP 58-30303004.686-7Other type: Pre-heated pressurized solar water heater