What temperature is an ordinary sprinkler head rated at?

What temperature is an ordinary sprinkler head rated at?

• A. 135 Degrees F
• B. 165 Degrees F
• C. 200 Degrees F
• D. 212 Degrees F

Answer: (B)

Sprinkler heads have a temperature rating that determines the ambient temperature at which the heat-sensitive element will release water. This rating is tied to the hazard level of the space: light hazard heads are commonly rated around 135°F, ordinary hazard around 165°F, and extra hazard around 200°F. The 165°F rating means the head will activate when the surrounding temperature reaches about 165 degrees Fahrenheit, which fits ordinary-risk environments. The other values correspond to different hazard classifications or are not standard ratings for ordinary heads (135°F for lighter duties, 200°F for higher-risk areas, and 212°F is simply the boiling point of water and not a typical sprinkler rating).

Sprinkler heads have a temperature rating that determines the ambient temperature at which the heat-sensitive element will release water. This rating is tied to the hazard level of the space: light hazard heads are commonly rated around 135°F, ordinary hazard around 165°F, and extra hazard around 200°F. The 165°F rating means the head will activate when the surrounding temperature reaches about 165 degrees Fahrenheit, which fits ordinary-risk environments. The other values correspond to different hazard classifications or are not standard ratings for ordinary heads (135°F for lighter duties, 200°F for higher-risk areas, and 212°F is simply the boiling point of water and not a typical sprinkler rating).