SSU stands for which sprinkler type?

• A. Small Sprinkler Upright
• B. Sprinkler System Upright
• C. Standard Sprinkler Upright
• D. Standard Sprinkler Unit

Answer: (C)

SSU stands for Standard Sprinkler Upright, which is the designation used to describe a sprinkler that is the regular, standard type installed in an upright orientation. Upright means the sprinkler is mounted so its deflector is above the flow line and the spray pattern goes upward and outward, which is common in areas with obstructions or in ceilings where overhead clearance is needed. The word “Standard” indicates it’s the regular, non-special version of a sprinkler, not a small or unitized variant, and not a system-specific designation. That combination—standard type with upright installation—is what SSU conveys. The other options would change either the size/spec or the orientation and thus don’t fit the established labeling.