In 2 minutes, produces 1 gallon of quality water necessary to comply with all sterilizer manufacturer TDS level guidelines. Red/green light meter constantly monitors to ensure TDS levels below 200 K/OHM (2.5 ppm), and inform operator when it is time for cartridge replacement. Countertop or wall mount. Ezee Faucet Diverter attaches to end-of-sink spout, enabling sink to be used normally or diverted through unit. UL/CSA approved. 1-year parts warranty (excluding cartridges) from manufacturer.