... heat exchanger),specially design for split pressurized solar water heater system Pressure water tank:I. Product information:Water ... coils(heat exchanger),specially design for split pressurized solar water heater system3. Improved Technology, high quality, popular design, ... 2mm)4.working pressure:6bar,testing for 12bar5.with electric heater(220V,50HZ) can be 110V ,60HZ6.with accessory :exhausted ...