Ultraviolet UV Light Under Sink Five Stage Drinking Water Filter System Five cartridges include UV lamp and chamber + Food Grade Pipe + Premium Faucet+ Other accessoriesBuilt-in wall bracketCompact design, Space-efficientHigh capacity standard 10″x2.5 filter cartridgesEasy to change filter cartridgeClear first stage housing, easy to check the condition of sediment filterUltraviolet light completely kills bacteria and virus in the water without using any chemicals Water Quality® Association Description This undersink 5 stages UV water filter is suitable for home, apartment, schools, hotel, restaurant and anywhere there is a faucet connection. Is ideal for kitchens with limited under sink cupboard space. It requires 110V electric power supply to lit the UV lamp. 5 Stage Filtration Stage 1- pp filter cartridge (made of Polypropylene) Remove the particles, impurities and dust in the water. This cartridge usually works as the previous cartridge to protect the behind filtration for water treatment system. Stage 2- GAC (granular activated carbon cartridge) Water treatment for removing chlorine, taste and odor, organics and suspending particles. Stage 3- BAC (block activated carbon cartridge) Water treatment for removing chlorine, taste and odor, organics and suspending particles. Stage 4- T33 Post Filter (bade of coconut grade GAC filter) Adjust taste and remove chlorine, taste and odor, organics and suspending particles. Stage 5- UV Light (6W) Completely kill bacteria and virus in the water through physical reactions. No chemicals involved. Consistent performance. Sterilization effectiveness will not decrease over time. Note: UV light will consistently sterilize your water. But the input water quality may vary over the time. If this system is the only treatment for your drinking water, please test the output water regularly by professional water quality labs to make sure it is safe for drinking. Since there may be many different kind of risks in the untreated water supply, this system alone can’t guarantee the safeness of the water it produces if its input water is not from a tested drinkable water resource. UV light of this system stays on all the time for two reasons: 1. UV light bulb is like fluorescent light, frequent shut-off will greatly reduce its life span. 2. The UV light bulb takes a second to warn up from cold to reach its full sanitizing power. If it only turns on when the faucet is turned on, not fully sanitized water can be produced for the user. Note: Active charcoal carbon filters are most effective at removing chlorine, sediment, volatile organic compounds (VOCs), taste and odor from water. They are not effective at removing minerals, salts, and dissolved inorganic compounds, which are main sources of TDS (Total Dissolved Solid) reading. That means you will not see a significant drop on TDS readings by any carbon filters. Typical particle sizes that can be removed by carbon filters range from 0.5 to 50 micrometres. The efficiency of a carbon filter is also based upon the flow rate regulation. When the water is allowed to flow through the filter at a slower rate, the contaminants are exposed to the filter media for a longer amount of time. *IMPORTANT NOTE: If you are not very familiar with quick connect fittings, please watch the video at https://www.youtube.com/watch?v=-Avzf-jsHyM to learn how to remove and insert pipe to the fitting. You need the skill to install the system correctly. Item includes: 1 x PP10 Sediment filter (1 micron)1 x GAC10 Granular Activated Carbon filter 1 x CTO10 Block Activated Carbon filter (1 micron)1 x T33 Coconut Base Granular Activated Carbon filter 1 x Stainless Steel UV Chamber 1 x UV lamp and glass tube with silicone seal 1 x 110V adapter 1 x under sink 5 stage water filter system 1 x premium faucet Can be upgraded to the luxury goose faucet (Polish Chrome) for additional $151 x Tee valve water connector (1/2″ in/out NPT ports and 1/4″ OD Quick Connect output with valve)2 x food grade hose 1 x housing wrench Dimension: 17″ x 15″ x 5″ Package: Plain box packaging. Order Replacement Filters:Refill filter Cartridge set (323897406857): PP + GAC + CTO + T33 Two Replacement 6 watt UV lamp (325917756616)Replacement 6w UV Ballast Power Supply: (225386536588)Replacement O Ring (321568525068) Luxury Goose Faucet (222039453720)