... of the split pressure solar water heater : The heat exchanger models can be used for houses which have been already equipped with ... specialized , so the system runs automatically .3.The water tank can be installed anywhere .4.The heat pipe vacuum tube collector ... keymark,SGS,CCC3.Life span:Approximate 15 years 4.We can customize according to customers' requirement Certificates :CE,ISO9001,SRCC,Solar ...