Which statement describes the nozzle installation requirement in 4.2.5.5?

• A. No installation criteria are provided.
• B. Per the manufacturer’s installation and maintenance manual.
• C. Nozzles shall be installed so as to be free of obstructions that could interfere with the proper distribution of the discharged agent in accordance with the manufacturer’s installation and maintenance manual.
• D. No further guidance is given.

Answer: (C)

The main point is that nozzle installation must keep the discharge path clear so the agent spreads as intended, and it must follow the manufacturer’s documented guidance. This statement demands that nozzles be installed free of obstructions that could interfere with proper distribution, and it ties that requirement to the manufacturer’s installation and maintenance manual. That combination ensures both physical clearance for the spray pattern and adherence to the specific procedures and recommendations designed for that system. Other options fall short because they omit the obstruction concern, or they ignore the need to follow the manufacturer’s detailed instructions, leaving out essential guidance about making sure the nozzle setup actually delivers the agent where and how it’s expected.