What is the temperature rating range for green color coded sprinkler systems?

• A. 400 - 475
• B. 500 - 575
• C. 650
• D. 1500+

Answer: (A)

Sprinkler heads use color coding to quickly show their temperature rating. The green-coded heads are rated for high heat, specifically 400 to 475 degrees Fahrenheit. The rating tells you the temperature at which the head will release water, not the room’s normal temperature. Using a high-temperature head like the green-rated one is important in areas that may experience higher heat loads or warmer ambient conditions, so the sprinkler won’t discharge prematurely but will operate when that higher heat threshold is reached. Different colors correspond to different temperature ranges, so the green color simply indicates this particular high-rating range.