... ,ISO14001,CCC,CE,Solar Keymark 2.solar water heater:heat pipe tube 3.pressure:press Solar water heater: material:1.volume of storage ... ,test pressure:12bar3.dust ring gasket :EPDM4.evacuated tube:three-target tube,high boron and silicon,content 3.3,structure,gradual ... be operated completely automatic if connect with intelligent controller.2.Simple structure,easy plug-in installation,can be installed ...