Great for light commercial use in restaurants, labs, salons, cafes, offices, schools, etc. Feed Water Pressure: 22 – 95 psi.The oversized 20″ pre RO filters provide up to 30,000 gallons of filtered water, twice as much as the industry standard 10″ filtersEconomical & Environmentally Friendly. Eliminates Plastic bottles. 20″ Premium filters ensuring a longer filter life.Compatible with most pressurized storage tanks; tank not includedBuilt in booster pump increases the production of purified water by raising the water pressure to the optimal level for the reverse osmosis process This Unit comes with the Following: 1st stage Sediment Filter 2.5 x 20 2nd Stage GAC cartridge 2.5 x 20 3rd Stage Carbon Block 2.5 x 20″ 4th stage Membranes – up to 2000 GPD 5th stage Post Carbon filter. Booster pump Drain control valve. Housing Wrench Stand Bracket