Koolermax K5 5-stage Drinking water RO system 75GPD New complete Koolermax 5-stage Drinking water RO system, 75GPD NEW, Complete The system come with RO unit, pressure tank, dispensing faucet, all filters, installation hardware auto-shut-off when the tank is full, high capacity filters. pressure gauge included, reads operating pressure and know when to replace the bottom 3 filters Assembled in USA with NSF and FDA approved components, tank holds 2 gallons, larger tank available