Which color denotes sprinkler heads rated 175° to 225°F?

• A. White
• B. Red
• C. Blue
• D. Green

Answer: (A)

Sprinkler heads use color to show the temperature at which they will release. The color white is used to denote a higher activation temperature range, specifically about 175° to 225°F. This means the head won’t activate in normal room temperatures and only trips when the surrounding air reaches that higher temperature. The color coding helps inspectors and installers quickly identify the head’s rating without reading tiny print, and it guides you to choose the right head for areas that may experience higher ambient heat or near heat sources. Other colors correspond to different, lower or different activation ranges, so they wouldn’t indicate the 175°–225°F range. Always verify the rating on the head itself or the manufacturer’s data for accuracy.