Pressure solar collector with U pipe

pressure solar collector: 1, Manifold (interior): red copper 2, Manifold (exterior): Aluminum alloy3, Glass tube dimensions: 58mm x 1.8m4, Heat preservation: 72hrs5, Hail resistance: 25mm6, max pressure: 6 bar7, Coating of vacuum tube: SS-C8, Heat Pipe: anti-freezing > -35°C9.The water is heated by the heat pipe rapidly. 10.There is no water in the vacuum tube,so the tube will not break in the winter. 11. It can be combined with the architecture perfectly. 12. It can be combined with existing pipeline. 13. It can be still operate in the event of occasional tube breakages