Which sprinkler head orientation is mounted on a wall near the ceiling and sprays across the room?

• A. Pendant
• B. Upright
• C. Sidewall
• D. In-floor

Answer: (C)

Sprinkler head orientation determines where the water is aimed and how the pattern fills the space. A sidewall sprinkler head is mounted on a wall near the ceiling and designed to spray horizontally across the room, reaching the opposite wall and covering the area along that wall. This configuration is chosen when you want efficient cross-room coverage, often in corridors or rooms where ceiling-mounted heads might be obstructed or harder to space evenly. In contrast, pendant heads hang from the ceiling and spray downward, upright heads project from piping and spray upward, and in-floor heads sit in the floor spraying upward. So the description of a wall-mounted head near the ceiling that sprays across the room matches the sidewall orientation.