U pipe collector

1) The water is heated by the heat pipe rapidly.
2) There is no water in the vacuum tube,so the tube will not break in the winter.
3) It can be combined with the architecture perfectly.
4) It can be combined with existing pipeline.
5) It will be affected by the local water quality,it doesn't suit hard water.
6) It can be still operate in the event of occasional tube breakages.

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