The vacum tubes absorb the solar energy then transfer into the heat energy, then pass it to the U pipe, which transfers the heat to the water tank. Vacuum tubes contain no water, therefore tubes will not break in the winter. It is steady and long last and can be combined with the architecture perfectly. It can be combined with existing pipeline and even operate in the event of occasional tube breakages.
Feel free to contact us for more information, we produce all sort of solar water systems. Our specilazed markets are United States, Canada and Mexico.