1THE Water Filter System UF Pro Set The most inexpensive way of removing 90 to 99% of all contaminants and rejecting practically all particles, bacteria and organics. It is Economic, Efficient and the Cheapest way to get clean alkaline water with the pH level of 9 or more. The EASIEST way to change and manage the filters. Just TWIST OFF the old part and TWIST ON the new one to change the filters. ANYONE can change the filters without difficulty within a short amount of time. With MINIMIZED number of parts, 1THE water filter system provides you the simplest design with space efficiency in your kitchen. Just SCAN QR CODE and DOWNLOAD the 1THE application. Then you will be noticed when you need to replace the filters so you don't have to guess anymore. 1THE ALARM application will let you know. Complies with NSF/ANSI 42 and all applicable requirements, recognized by NSF international. Also, certified internationally with various certifications such as RoHS, ISO 14001/9001, WQA Gold Seal, GOST, Australia W and Italian DM25.