New or replacement valves are not required to be which type?

New or replacement valves are not specifically required to be of the ball type because there are various types of valves that can function effectively in medical gas systems. While ball valves are widely used due to their reliability and ease of operation, the regulations and standards governing medical gas installation do not mandate that only ball valves are acceptable.

There are other valve types, such as globe valves or gate valves, that can also be utilized depending on the specific application and requirements of the system. The flexibility in valve types allows installers to choose the most suitable option based on factors like cost, availability, and system design.

In contrast, requirements for copper tube extensions for brazing, permitting in-line serviceability, and using a quarter turn to turn off are typically mandated for ensuring functionality and safety within medical gas applications. These elements are crucial for maintaining the integrity of the gas supply and allowing for safe maintenance and operation.