... fatures:Components:CollectorsSolar pump station Controller with sensorsExpansion tankCirculation pumpCheck valve, safety valveManometerBrass connectorMounting hardwarePipingMaterial:Water tank: 1) Water tank (interior): stainless steel ... ) Copper coils(single): dia12mm, thickness 1.0mm, length 15m/pcs3) Tank capacity: 150L, 200L, 250L, 300L , 400L, 500LHeat pipe solar collectors ...