... house,so it will not be cool so quickly. Split Pressurized solar water heater1.Heat pipe Vacuum tube specification: 58X1.8M, ... heat pipe. 2.Valum of tank: 100L, 150L, 200L, 250L,300L,500L and so on.3.Outer tank: ... stainless steel, With thickness 2.0mm, and high pressurized,when the capacity is larger,the inner is thicker ... ,thickness 1.0mm.single or double loaded. Split Pressurized solar water heater