What information must be permanently marked on clean agent discharge nozzles?

• A. Material
• B. Color
• C. Temperature rating
• D. Type and size of the orifice and Manufacturer

Answer: (D)

Knowing what is permanently marked on clean agent discharge nozzles is about having the essential identifiers for correct performance and service. The marked type and size of the orifice tells you the exact flow characteristics—how much agent will be released and at what rate—and the spray pattern associated with that nozzle. The manufacturer is included so you can source the right replacement parts and follow any installation notes specific to that nozzle. Together these markings ensure the nozzle matches the system design, supports accurate discharge calculations, and allows service personnel to obtain correct spare parts or verify compatibility with the piping and control valves. Other markings like material, color, or temperature rating don't provide the critical flow and compatibility data needed for correct operation, so they are not the required permanent markings for discharge nozzles.