In a deluge system, if the hydraulically most remote nozzle is not accessible, how should pressure readings be recorded?

• A. The next nearest nozzle shall be used for the pressure reading.
• B. The nozzle can be checked visually without taking a pressure reading.
• C. Pressure readings should be taken at the next two nearest nozzles.
• D. The riser should be used for the pressure reading

Answer: (B)

In a deluge system, all sprinklers are open and water is released to all heads when activated. The purpose of checking pressure at the hydraulically most remote nozzle is to confirm the system can deliver water to the far end. If that nozzle isn’t accessible, you still need to verify that water is reaching the system and flowing to the head. A visual check of the nozzle to confirm discharge demonstrates that the system is actuating and delivering water, without requiring a pressure reading at that inaccessible location.