Under Sink Four Stage Domestic Water Filter System Four cartridges + Food Grade Pipe + Premium Metal Faucet + Other accessoriesPremium Metal Faucet ($26 value)Built-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 filterWater Quality® Association Description This undersink 4 stages 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. 4 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- Post Filter (coconut grade GAC filter cartridge) Adjust taste and remove chlorine, taste and odor, organics and suspending particles. 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 PP Sediment filter (1 micron)1 x Granular Activated Carbon filter 1 x Block Activated Carbon filter (1 micron)1 x Coconut Base Granular Activated Carbon filter 1 x under sink 4 stage water filter system 1 x Premium metal faucet (Polished Chrome Finish)1 x Tee valve water connector (1/2″ in/out NPT ports and 1/4″ OD Quick Connect side output with valve)2 x food grade hose 1 x housing wrench Dimension: 15″ x 13″ x 5″ Order Replacement Filters: Refill filter Cartridge set (323897406857): PP + GAC + CTO + T33 Replacement O ring (321568525068) Premium Faucet (321418773325)