vacuum tube solar collector ,there is a heat pipe in vacuum tube,so there is not water in vacuum tube,not worried about icing. vacuum tube solar collectorFeatures: 1)the most important part of split and pressure solar water heater 2)Easy to use and install 3)Can be put in the courtyard, on the roof or balcony 4)Inlet water hole connects to the tap water, and the&bsp;the outlet hole connects to tp ...
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