Author: Jonathan Willard

NFPA 99, 2012 edition and most other editions have an “existing systems clause” helps to clarify that the requirements of the specific edition of the code are not meant to apply to existing systems.

I would like to clarify the NFPA 99 requirements for zone valve box locations and an intervening wall between the zone valve and patient outlets per NFPA 99 (2015 Edition) 5.1.4.6.1 (1).

NFPA 99 requires testing to be performed anytime a medical gas system is “breeched.” The code has a broad definition of what it means to breech a medical gas or vacuum system. The code deems a breach of the system as anytime that there is a pipeline intrusion by physical separation OR when a system component is removed, replaced, or added.