If you see a solder link sprinkler with blue paint on the frame arms from the factory, what temperature is this sprinkler?

The presence of a solder link sprinkler with blue paint on the frame arms indicates that this sprinkler is designed to activate at a temperature of 286°F. Solder link sprinklers use a fusible link or solder that melts at a specific temperature to trigger the sprinkler when a fire occurs, allowing water to be released to combat the flames.

Different colors of paint on the frame arms correspond to different activation temperatures, which helps identify the sprinkler type quickly. In this case, the blue paint clearly signifies the 286°F activation temperature. When understanding sprinkler systems, knowing the temperature ratings of various components is crucial for their effective application in fire protection strategies.