... , antifreezing, fashionable design, Keymark, CE, Main features of swimming pool solar collector:Manifold: aluminum alloy Head pipe: copper pipeInsulation layer ... freeze: under 40°C Anti-hailstone: 30mm Water temperature rise: 35°C Water production: 8 to 9L for single pipe about ... 40ft container: 166 piecesFor more details about our swimming pool solar collectors, please check our website, or email us ...