Sprinkler heads are rated by their release mechanisms, mounting positions, and:

• A. Color
• B. Release temperatures
• C. Size
• D. Brand

Answer: (B)

Temperature rating is the key factor that defines when a sprinkler head will release water. The release mechanism (how the water is triggered) and the mounting position (where and how it’s installed) determine the physical activation and spray pattern, but the temperature rating sets the heat threshold that must be reached for activation. This rating ensures the head responds appropriately to the environment, preventing premature or delayed discharge. Colors or brands aren’t used as performance ratings, and size isn’t the standard rating that governs activation.