... ,ISO9001,ROHS 2.High efficiency Anti-freeze heat pipe swimming pool solar collectors with CE ,SRCC and keymark certificates, it ... is suited for or some projects(swimming pool or hotel)...We are professional swimming pool solar collector, solar water heaters, solar ... 24mm Premium Heat Pipe Performance and Specification:Heat pipe materialOxygen free copper (TU1),Cu=Ag>99.99%(o2<16ppm)Condenser ...