Crystal Quest's 10-stage Reverse Osmosis System provides safe drinking water with a capacity of up to 50 gallons per day using Reverse Osmosis technology. The 50 GPD equates to a production of approximately 2 gallons per hour, depending on water pressure and water conditions. This reverse osmosis system is great for homes, apartments, offices, RV's, and laboratory use. It is convenient, easy to use, and hooks up to the sink faucet. All hardware included.