... should be food grade,all the parts which contact with water are made of food-grade stainless steel 304. corrosion- ... inner surface the tubes, While refrigerant evaporate outside, freezing water into ice. The ice tube gets more and more thick ... )DiameterΦ22,Φ25,Φ29,Φ32,Φ35Length25,30,35,40Ambient Temp.+32°CWater Temp.+20°CCompressor brandCopeland / Bitzer / Hanebll RefrigerantR404A / R22Compressor input ...