The project includes the restoration of a reverse osmosis water treatment plant with a production capacity of 300 m3 / day. The project consisted of a comprehensive maintenance of the RO, showing its operational problems and repairing them. Periodic visits were made during the year and emergency visits were made when needed. During the periodic visits, sand filters are washed and checked, chemical tanks are washed, and chemicals are prepared in appropriate doses with each visit and check. Monitoring the pumps and following up the readings, avoiding the possibility of problems appearing in the RO as much as possible, dealing with any leaks in the RO, checking the electrical connections, checking the measuring devices and readings.