copper pipe collector 1.With CE,GMC,ISO,SOLAR KEYMARK, SRCC certification 2.High efficient,stable performance 1. Working principle:The heater pipe ... solar collectro absorbs solar energy and transmits it to the water tank through ... --60mm imported PU.4.Copper coil:15m-20m each, diameter 12mm,thickness 1mm. 5.Heat pipe:Ati-freeze:-35C6.Capacity:100L ...