Equipment approved for fire sprinkler installation must be ________.

• A. Listed by UL
• B. Certified by NFPA
• C. Acceptable to the AHJ
• D. Approved by the manufacturer

Answer: (C)

Equipment approved for fire sprinkler installation must be acceptable to the AHJ. The authority having jurisdiction is the final judge of whether a specific piece of equipment can be used on a project, based on how well it fits the local codes, standards, and the particular installation conditions. In practice, equipment is typically supported by evidence such as listings or approvals from recognized testing organizations (like UL or FM), which show it has been evaluated to applicable standards. But the AHJ reviews that evidence and decides if it’s permitted for that site and installation type, considering factors like hazard class, environment, and compatibility with other components.

So, while listing or certification helps demonstrate compliance, the decisive requirement is that the AHJ finds the equipment acceptable for the job. Manufacturer approval alone doesn’t guarantee acceptance, and NFPA certification isn’t a universal substitute for AHJ approval.