What is a key characteristic of a dry sprinkler system?

A key characteristic of a dry sprinkler system is its ability to prevent freezing in pipes. This is particularly important in environments where temperatures may drop below freezing. In a dry sprinkler system, the pipes that run through unheated areas are filled with pressurized air or nitrogen rather than water. This setup ensures that there is no water in the pipes that could freeze and cause blockages or bursts. When the system activates, the pressurized air is released, allowing water to flow into the pipes and out through the sprinklers.

This design is essential for maintaining functionality in cold climates, making it an ideal choice for buildings that may experience freezing temperatures. Other characteristics, such as constant water flow or immediate deployment in emergencies, do not specifically define dry sprinkler systems, as their operation depends on the activation by heat or a drop in temperature rather than user deployment. Additionally, while installation costs can vary, they are not a defining trait of the dry system compared to its primary function of preventing freezing.