... Separated solar water heater is widely used for project. Split Pressurized Solar Water HeaterProduct Specification Vacuum Tube:58 x 1800mm ... 20, 25, 30, 40, 50Inner Tank: Material: SUS304 2B food grade stainless steelouter tank: Material: colorful steel,stainless steel,galvanized ... color Available color is up to you.Capacity of water tank (Liters): 100, 150, 200, 250, 300, 400, 500Insulation ...