Stage 1 - 5 micron sediment filter removes particulates Stage 2 - GAC filter removes chloramine, tastes, chemicals, and odors Stage 3 - 5 micron carbon block filter removes chloramine, tastes, chemicals, and odors not caught by the GAC filter Stage 4 - Pentair TFC reverse osmosis membrane, purifies the water removing 90-95% of contaminates Stage 5 - DI filter removes up to 99% of ALL contaminates from water Stage 6 - Inline Post filter - polishes water to ensure great, fresh tasting water Includes all the parts you need to install the system in most applications, including 3/8" compression feed water connector & ball valve (fits almost all standard water lines), drain saddle valve, tank ball valve, filter housing wrench, color coded tubing, and a chrome ceramic-disc, quarter-turn deluxe faucet. Most water supplies contain a wide range of contaminates that are not good for you. A lot of people solve this problem by buying bottled water, but bottled water can get expensive, not to mention the hassle of carrying it around and the problem of running out. Our RO systems solve this problem, giving you bottled quality water at your finger tips! Our high quality RO systems will ensure that your families drinking water is safe, and you never have to worry about going out to buy water again! The system removes fluoride, arsenic, lead, plus much more! Order one today! Our systems are quality made in the using NSF certified components, so you can be assured you are getting the highest quality system available. Don't mistake our low prices for low quality, we back our systems with a 30 day satisfaction and a 1 year ! We also offer phone and email support to answer any questions you may have. , and are there for you if you need help.