What is the purpose of marking and labeling in NFPA 16?

• A. To clearly identify system components, concentrations, and operating instructions for responders and maintenance personnel
• B. For decorative purposes
• C. To document the system's installation date and responsibilities
• D. To confuse potential intruders

Answer: (A)

Marking and labeling ensure immediate clarity for anyone operating, inspecting, or maintaining the system. By clearly identifying each component, the specific foam concentrate used, its mixing ratio or concentration, and any operating instructions, responders and maintenance personnel can act quickly and correctly during normal operation, testing, or an emergency. This reduces the risk of using the wrong concentrate, missetting a valve or proportioner, or following ambiguous procedures, which is especially critical in foam-water systems where precise mixing and correct sequencing matter for effective foam blanket formation.

In practice, labels and tags guide users to the right actions — where to open or close a valve, what concentration to apply, how to start or stop the foam proportioning, and any special handling notes. They also aid routine maintenance by documenting what is installed, what needs servicing, and what procedures to follow, all of which supports safety, reliability, and compliance.

Decorative purposes, documenting only installation dates and responsibilities without labeling on the equipment, and attempting to mislead or confuse anyone are not the purposes of marking and labeling.