Sprinkler Activation is triggered by which?

Sprinkler Activation is triggered by which?

• A. Automatic Water Supply
• B. Wet Pipe Sprinkler System
• C. Thermal Barrier
• D. Sprinkler Activation

Answer: (D)

Activation is caused by heat at the sprinkler head itself. Each sprinkler head has a temperature-sensitive element, such as a glass bulb with a liquid or a fusible metal link, that holds a valve closed. When the surrounding fire raises the head to its rated temperature, this element fails or breaks, opening the water passage and releasing water into the piping for discharge. The automatic water supply and the piping system don’t trigger the release themselves—they simply deliver water once the sprinkler head has activated. The trigger is the heat-responsive mechanism inside the sprinkler head, not the system type or the water supply.

Activation is caused by heat at the sprinkler head itself. Each sprinkler head has a temperature-sensitive element, such as a glass bulb with a liquid or a fusible metal link, that holds a valve closed. When the surrounding fire raises the head to its rated temperature, this element fails or breaks, opening the water passage and releasing water into the piping for discharge. The automatic water supply and the piping system don’t trigger the release themselves—they simply deliver water once the sprinkler head has activated. The trigger is the heat-responsive mechanism inside the sprinkler head, not the system type or the water supply.