What is the function of the water-control valve in a dry-pipe system?

The function of the water-control valve in a dry-pipe system is to manage water flow when air is released. This is crucial because dry-pipe systems are typically filled with air or nitrogen to keep the water in the supply pipes at bay until a fire is detected. When a sprinkler head is activated, the air pressure in the system is released, triggering the water-control valve to open, allowing water to flow into the pipes and out through the activated sprinklers. This controlled response ensures that water is delivered precisely where it is needed while minimizing the risk of unwanted flooding from other areas of the system where no fire exists.

Understanding this function helps illustrate how dry-pipe systems are designed for fire suppression by efficiently allowing water to reach the locations in need without premature activation.