How should water spray nozzles be positioned?

• A. In any position necessary to obtain proper coverage in a protected area.
• B. Evenly spaced along the pipe.
• C. In accordance with manufacturers specifications.
• D. At a 45 degree angle to the ground.

Answer: (C)

Position nozzles exactly as the manufacturer specifies to guarantee the spray pattern, reach, and coverage needed for the protected area. The manufacturer’s guidelines are based on the nozzle design, flow rate, system pressure, and the room layout, including obstructions and clearances. Following these specs ensures complete coverage where intended and prevents gaps, overspray, or interactions with equipment. Arbitrary placement can leave dead zones or cause spray to be blocked or misdirected. Simply spacing nozzles evenly along a pipe isn’t inherently correct because spacing must match the nozzle’s rated coverage and the space geometry. A fixed 45-degree angle isn’t universally correct either, since different installations require different orientations to achieve the designed spray pattern.