·       The vacuum tubes absorb the solar energy and transfer into heat energy, then pass into evacuated ETC pipes, rapid heat is transferred at high temperature.

 ·        It is steady and credible.

 ·        Easy Installation.

 ·        Suitable for main water Pressure.

 ·        Easy to connect in series for large quantity of water.

·        If there is no water in the vacuum tube, so tube will not break.