... ,ISO14001,CCC,CE,Solar Keymark 2.solar water heater:heat pipe tube 3.pressure:press Solar water heater: material:1.volume of storage ... :0.4mm inner tank,stainless steel SUS304-2B,thickness:1.2-1.5mm,normal working pressure:6bar,test pressure:12bar3.dust ... .can be operated completely automatic if connect with intelligent controller.2.Simple structure,easy plug-in installation,can be installed both ...