... Pre-heat pressurized solar water heater 1. ISO 9001, CE, CCC; 2. With Copper coil in inside water tank; With high ... and pressurized. Working pressure: 0.6MWarm keeper of water tanks are polyurethane frothed, thickness 40-60mm, there ... SUS304, SUS202, Colored steel, 0.31-0.6mm thickness:3. Copper coil: Diameter 12mm, 0.65mm thickness;Item No ... .686-7Other type: Pre-heated pressurized solar water heater