... technical secret will be told to our reliable Customer. Copper pipe solar collector 1.CE,Solar Keymark, TUV, CCC,ISO ... water heater, pressurized solar water heater, vacuum tube solar water heater, heat pipe solar water heater, non pressure solar collector, ... :1.Inner manifold : copper header2.Outer manifold: Aluminium alloy3.Insulation: rock wool4.Rubber Seals and Rings: Stabilized high temperature ...