... the house,so it will not be cool so quickly. Split Pressurized solar water heater1.Heat pipe Vacuum tube specification: 58X1.8M ... , 200L, 250L,300L,500L and so on.3.Outer tank: High quality imported and Aluminum zinc plated steel board.4.Inner tank ... thickness 2.0mm, and high pressurized,when the capacity is larger,the inner is thicker to endure the pressure.5.Frame: Aluminmum ...