Flat plate solar collector 1,Pressurized type 2,five year warranty 3,Popular in Europe 4,Absorber Germany Alanod Flat plate solar collector We are a professional enamel hot water ... )66Header Pipes (mm)Copper 22*0.8Copper 22*0.8Riser Tubes (mm)Copper 10*0.6Copper 10*0.6Absorber StructureFull-surface absorberFull-surface absorberAbsorber ...