For exposed surfaces of sprinkler systems, what action is required?

• A. Apply protective coating to exposed surfaces.
• B. Leave exposed to air for inspection.
• C. Paint with any color.
• D. Use only epoxy for interior surfaces.

Answer: (A)

Exposed sprinkler-system surfaces must be protected from corrosion and damage. When piping and hangers sit in view, especially in environments that can cause rust or wear, applying a protective coating helps preserve the integrity of the piping and the reliability of the sprinkler system. The coating can be factory-applied or field-applied, as long as it is approved for use with sprinkler systems and does not impair the sprinkler’s performance, coverage, or accessibility for inspection. Leaving surfaces unprotected or choosing colors or coatings without consideration for compatibility and performance doesn’t meet the protection needed, and insisting on epoxy only for interior surfaces is unnecessarily restrictive and not the standard requirement.