... 4 stages. Stage 1: Sediment filter removes suspended impurities from inlet water. rwater purifier,water softener ... are 4 stages.Stage 1: Sediment filter removes suspended impurities from inlet water. Stage 2: Metallic ion ... arsenic, cadmium, zinc, manganese, selenium, iron, chromium, aluminum, nickel and copper, as well as to suppress the growth ... rwater purifier,water softener,water purifying equipment)