... 250, 300L 400L 500L 1000L2) Water tank inner diameter: 400, 400, 520, 520, 520mm 3) Water tank outer diameter: 480, 480, ... 610, 610, 610mm 4) Thickness of inner tank: 1.5,1 ... : stainless steel 304 or 306 available7) Size of water pipe: G1/2'' G3/4'' 8) Power ... inlet/outlet pipes are all made by stainless steel, overcome the disadvantage of porcelain inner ...