1. Separate Solar water heater, high pressure 2. Heat pipe vacuum tube 3. ISO, CE, CCC 4. ... extremely cold areas.1. It can withstand pressure of tap water when it works, working pressure 0.6MP.2. Completely automatic operation ... .8. Capacity:100L,150L,200L,250L,300L,400L,500L. Domestic high pressure heat pipe Separate Solar Water Heater 2 copper coils