... 25 / 30 Vacuum Tube Borosilicate glass, red copper heat pipe, aluminum fin Manifold Copper flow passage, PU insulation, Aluminium ... :The split pressurized solar water heater composes of heat pipe solar collector, storage water tank, workstation system, related ... accessories and interconnecting pieces, etc.Heat Pipe Solar Collector:1) Heat pipe solar collector for thermal collection, with a ...