Which statement best describes installation compliance for piping fittings?

• A. Fittings must meet specified standards for use.
• B. Fittings can be improvised in the field.
• C. Fittings must be painted red.
• D. Fittings can be reused after removal.

Answer: (A)

In sprinkler installations, fittings must be approved for use in the system. Piping fittings need to be listed or otherwise approved for sprinkler service and must be compatible with the system’s materials, connections, and pressure rating. This ensures they will perform reliably under pressure and won’t leak or fail, keeping the water supply to the protected areas dependable. Field-improvised fittings aren’t allowed because they haven’t been tested for sprinkler use. There’s no requirement to paint fittings red, and reused fittings aren’t automatically acceptable—removed or damaged fittings should be replaced with listed items or re-evaluated by the AHJ before reuse.