The WIN-645U is a 6 stage reverse osmosis + UV (ultra violet) light system. The add-on UV Water Treatment system makes this one of the best water treatment processes available. This under-sink RO unit provides superior quality drinking water with a capacity of up to 35 gallons per day. RO Technical Specifications: •6 Stage Water Filtration System      1) Sediment Filter      2) Carbon Filter      3) Carbon Filter      4) TFC Membrane      5) Ultra Violet      6) Carbon Filter •35 Gallons Per Day •4 Gallon Tank •Lead-Free Long Reach Faucet •All Hardware Included •2 Year Limited Manufacturer Warranty

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