What are the common types of sprinkler heads in residential and commercial systems?

• A. Pendant (hanging downward), Upright (extending upward), and Sidewall (mounted on a wall)
• B. Top, Bottom, and Sides
• C. Circular, Square, Triangular
• D. Hidden, Exposed, and Painted

Answer: (A)

The main idea is understanding how sprinkler heads are installed and how they spray to best cover a space. The most common types for residential and commercial systems are pendant, upright, and sidewall heads.

Pendant heads hang down from a ceiling pipe, so the sprinkler sits below the ceiling line and sprays downward in a generally circular pattern. Upright heads mount on top of the pipe and project upward, spraying outward from a point above the ceiling. Sidewall heads are attached to walls and spray outward toward the room, usually covering adjacent wall and floor areas.

These three cover the broadest typical installation scenarios: standard ceilings with unobstructed space (pendant), situations with limited clearance or obstructions above the sprinkler (upright), and locations along walls where ceiling mounting isn’t practical (sidewall). Their orientations also influence the spray patterns, with pendant and upright heads commonly offering full 360-degree coverage, while sidewall heads typically provide a 180-degree reach along the room.