TP series fresh hot water runs down simultaneously with tap open,more pressure, more confortable.The vacuum tubes absorb the sun’s rays and turn the rays into energy, heating the water in the tubes. As the temperature of the water is rising, The density turns slightly, then the hot water in the tubes floats into the tank, and the cold water in the tank goes down to the tubes. Keeping natural cycling like this, the water in the tank will be heatedThe vacuum tubes heat the water in the tank, but the users do not use the water in it directly. The cold water comes into the exchanger from one side and the hot water heated by the exchanger, and then the hot water comes out from the other side for use