What should all valves, except zone valves, be?

The response that all valves, aside from zone valves, should be secured, locked, and labeled is integral to maintaining safety and organization in medical gas systems. Securing and locking these valves prevents unauthorized access, which is crucial in a healthcare setting where the integrity of medical gases must be maintained to avoid potential hazards. Labeling is equally important as it provides clear identification of each valve's function and the type of gas it controls, which aids personnel during emergencies or maintenance procedures. This practice ensures that staff can quickly and accurately manage the gas supply, thereby upholding safety protocols and regulatory compliance essential in medical environments.

While pressure testing, easy access positioning, and regular maintenance are also important aspects of managing medical gas systems, the primary focus for all valves apart from zone valves emphasizes security and labeling as a direct measure of safety and operational efficiency in a clinical setting.