What is the maximum temperature rating associated with orange color coded sprinkler systems?

• A. 400 - 475
• B. 500 - 575
• C. 650
• D. 750

Answer: (C)

Sprinkler heads use color coding to show their temperature rating, which is the temperature at which the head will activate. Orange coding corresponds to a high-temperature rating of 650°F, meaning these heads are designed to remain shut in cooler conditions but will release at temperatures around 650°F. That’s why the maximum temperature associated with orange color coded sprinkler systems is 650°F. Other color codes map to different, generally lower, ratings, so they wouldn’t indicate 650°F.