What is the minimum distance requirement between a specified feature in the distribution system?

• A. 10 ft
• B. 15 ft
• C. 20 ft
• D. 25 ft

Answer: (D)

The distance requirement is there to reduce risk by creating a safety buffer between the medical gas distribution system and other parts of the building, such as potential ignition sources, ventilation paths, or areas where a leak could spread. By allowing a larger clearance, any possible gas leak is less likely to migrate into occupied spaces or to interact with equipment, and it also provides space for safe maintenance and testing.

Choosing 25 ft as the minimum distance reflects giving a substantial safety margin compared with shorter distances. A smaller gap could increase the chance that gas leaks travel toward doors, HVAC intakes, electrical gear, or other systems, compromising safety. In practice, this spacing helps ensure that, even in the event of a leak, distribution system performance and life-safety measures aren’t compromised.