... tank is in the house,so it will not be cool so quickly. Split Pressurized solar water heater1.Heat pipe Vacuum ... tube specification: 58X1.8M,with heat pipe or with out heat pipe. 2.Valum of tank: 100L, ... 150L, 200L, 250L,300L,500L and so on.3.Outer tank: ... and Aluminum zinc plated steel board.4.Inner tank: SUS304-2B for food grade stainless steel, ...