... , high pressure 2. Heat pipe vacuum tube 3. ISO, CE, CCC 4. SUS304 inner tank, 2 copper coils Separate solar water heater system is ... tap water when it works, working pressure 0.6MP.2. Completely automatic operation, the whole system controlled by the workstation.3. Collector ... . Capacity:100L,150L,200L,250L,300L,400L,500L. Domestic high pressure heat pipe Separate Solar Water Heater 2 copper coils