Semi -industrial water purifiers have a higher capacity than home appliances and can produce at least 2 gallons (800 liters) of refined water per day. Each home, industrial and semi -industrial water purifiers have their own use and capacity and are widely used for the production of treated water in various uses. If you are planning to prepare a water purifier, you need to get acquainted with the performance and features of each of these types before selecting the type of device you want and make this selection carefully.