The PuROTwist PT 3000 T50-SS AD reverse osmosis system is a model well tested by the water quality association America that has received NSF/ANSI 58 gold seal. It features a TFC membrane cartridge that is capable to deliver 36 gallons of water per day. It offers RO system with dual GAC or a sand dual media filter that is capable of removing organic compounds from the water. Like any other standard model, it offers auto shut off valve to prevent water loss. All its parts are supported by john guest fittings that provides durability to the model. It offers certified lead free air gap faucet, a solid material that helps to have a perfect flow of water.