Place under the kitchen counter. It is one of the best and most effective water filtration systems. It consists of 5 stages of cleaning. Details: 1st stage FCPS5 : 5 millionths (5 microns) sediment filter It is made of 100% pure polypropylene fibers, high capacity and removes dirt, dust, particles, rust and other sediments. FCCA 2nd Stage: Granular Activated Carbon Filter FCCA cartridges are NSF approved, coconut shell coated activated carbon, provide effective reduction of chlorine, organics, some pesticides and improve the taste and odor of filtered water. 3rd stage FCCBL: silver series solid activated carbon filter Removes chlorine, organics, chemicals, pesticides, unpleasant odor and taste from tap water 4th stage TFC-75F RO: High rejection membrane TFC (Thin Film Composite) Separates 95-99, 9% of dissolved pollutants, chemicals, solids, metals, bacteria and microbes from water molecules (see lead, copper, barium, chromium, mercury, sodium, cadmium, fluoride, nitrates and selenium). The pollutants are then removed through the drain. Aicro 5th Stage: Carbon Outflow Filter NSF approved, the outflow filter removes all odors and debris, improving the taste of water Reservoir Water is stored in a 12.2 liter tank. Inside the tank is a balloon-like rubber diaphragm that is pre-inflated with air to a pressure of 8-10 psi. As the container fills, the air pressure increases and the water is pushed out when the faucet is turned on. Spout Faucet The final element of the Aqua Filter Home Reverse Osmosis System is a Deluxe single faucet that sits on the kitchen counter or sink.