How are wet pipe systems typically activated?

Wet pipe systems are predominantly activated by the heat generated from a fire. This activation method relies on heat-sensitive elements, such as fusible links or glass bulbs filled with liquid, which are integral components of the sprinkler heads. When the temperature rises to a predetermined level due to a fire, these components react and release water from the pipes, effectively suppressing the fire.

This approach is effective because wet pipe systems are continuously filled with water, ensuring an immediate response to heat. The quick activation time is crucial in minimizing fire damage, making it a favored design in many commercial and residential settings.

The other activation methods listed, such as using a manual switch or a remote control device, are not standard for wet pipe systems and typically relate to different fire suppression systems or alarms. These do not provide the automatic and immediate response required in fire scenarios, highlighting the efficiency of heat activation in wet pipe systems.