Before I move in to the new house, I am still thinking using my old Diamond master filter with 10 micro filter. However I found out a product call Puregen UF2500. The Hollow Fiber Micro is only 0.01 micro. The out casing is stainless steel. The most important is only Cost RM 1,400 and is auto flush. After use it for 1 month the inside drinking diamond energy water filter is still white.