heat pipe solar collector 1) solar Keymark, SRCC , CE and CCC 2) used for spit solar water heater heat pipe solar collectorThe pipeline is made of red copper ... design. It is furnished in good style.Can endure high pressure when it works.Module design, optional combination, which ... quality problems 1, Manifold : red copper 2, Manifold Casing: aluminum alloy 3, Glass tube dimensions: 58mm x 1.8m4, Heat ...