Medical gas supply systems in hospitals and other healthcare facilities are utilized to supply specialized gases and gas mixtures to various parts of the facility. Products handled by such systems typically include:

• Oxygen
• Medical air
• Nitrous oxide
• Nitrogen
• Carbon dioxide
• Medical vacuum
• Waste anaesthetic gas disposal (US) or anaesthetic gas scavenging system (ISO)

Source equipment systems are generally required to be monitored by alarm systems at the point of supply for abnormal (high or low) gas pressure in areas such as general ward, operating theatres, intensive care units, recovery rooms, or major treatment rooms. Equipment is connected to the medical gas pipeline system via station outlets (US) or terminal units (ISO).

Medical gas systems are commonly color coded to identify their contents, but as coding systems and requirements (such as those for bottled gas) vary by jurisdiction, the text or labeling is the most reliable guide to the contents. Emergency shut-off valves, or zone valves, are often installed in order to stop gas flowing to an area in the event of fire or substantial leak, as well as for service. Valves may be positioned at the entrance to departments, with access provided via emergency pull-out windows.