A white-painted sprinkler indicates which temperature rating?

• A. Red paint indicates high temperature
• B. White paint indicates the Intermediate temperature rating
• C. Yellow paint indicates medium temperature
• D. Blue paint indicates very high temperature

Answer: (B)

Color on a sprinkler head is a quick clue to its operating temperature rating. White paint indicates an intermediate rating, a mid-range choice between ordinary and high. This ensures the head activates at fire temperature but isn’t triggered prematurely by normal room heat in warmer spaces. In practice, different colors map to other ratings (red for higher, yellow for medium, blue for very high), varying slightly by manufacturer, but the white color consistently signals the intermediate rating.