solar hot water heater: 1.High efficiency. 2.cheap and reabile solution,simple structure,easy installation. 3.Outsta solar hot water heater:1.Vacuum Tube Specifications: ø58x18002.Water Tank Liner: Imported SUS304-2B food grade stainless3.System pressure:The factory test pressure 0.2MPa pressure run4.Tank shell:Brushed silver porcelain plate5.Tube Number Range:16,18,20,24,30,366.Capacity: 130/145 ...