The medical gases used in a hospital are life-supporting element that gives direct influence in maintaining the life of a patient. Therefore, at the sections where the medical gases are used, the medical gas must be clean, highly pure and supplied under stable pressure. Our medical gas system has cleared those regulations and standards as well as passing our strict company standard. The system has a thorough going color coordination according to the kind of gas and we inspect cross connection at the time of commissioning. We use medical gas out let of different design for each gas in such a way that a person knowingly or unknowingly cannot make cross connection and can not give wrong gas supply to a patient.