What are the two main types of sprinkler system installations?

The two main types of sprinkler system installations are wet pipe systems and dry pipe systems because they represent the primary classifications based on their operational mechanisms and suitability for different environments.

Wet pipe systems contain water in the pipes at all times and are typically used in areas where the temperature is maintained above freezing. When a fire occurs, the heat activates the sprinkler heads, allowing water to flow immediately to extinguish the flames. This type of system is efficient and requires less maintenance compared to dry pipe systems.

In contrast, dry pipe systems have pressurized air in the pipes and are utilized in environments that may experience freezing temperatures. In these systems, the air pressure keeps the valves closed until a fire is detected, at which point the air escapes, allowing water to flow from the pipes. This design prevents freezing, making it suitable for unheated structures or areas exposed to cold temperatures.

Understanding these two systems is crucial for selecting the proper installation based on environmental conditions and the nature of the facility being protected.