... solution,simple structure,easy installation. 3.Outsta solar hot water heater:1.Vacuum Tube Specifications: ø58x18002.Water Tank Liner: Imported SUS304-2B food grade ... ,20,24,30,366.Capacity: 130/145/160/190/240/2857,Elegant design8..Cheap and reliable solution, simple structure,easy installation solar water heater