... characteristic of the split pressurized solar water heater system:1.The heater collector and the water tank is separated, that makes the system ... The split solar water heater systen can work at anti-freezing -35 celsius degree5.Can be combined with gas or electric heater.Specification:1 ... 4.Copper coil:15m-20m each, diameter 12mm,thickness 1mm. 5.Heat pipe:Ati-freeze:-35C6.Capacity:100L,150L,200L,250L ...