In a Dry Pipe Sprinkler System, what happens when a sprinkler head opens?

In a Dry Pipe Sprinkler System, when a sprinkler head opens, the air pressure within the system is reduced. This type of sprinkler system is specifically designed for environments that may experience freezing temperatures, where water is not stored in the pipes but instead held in a valve that keeps the pipes filled with air.

When a fire occurs and a sprinkler head is activated due to heat, it opens and allows the air in the system to escape. This reduction in air pressure triggers the dry pipe valve to open, permitting water to flow into the piping and out through the activated sprinkler head. The release of air pressure is a critical step, as it initiates the flow of water needed to suppress the fire. Understanding how the system operates can help in designing effective fire protection measures in buildings, especially in areas vulnerable to freezing conditions.