Which of the following are the two main types of sprinkler systems used in buildings?

The two main types of sprinkler systems used in buildings are wet pipe systems and dry pipe systems. Wet pipe systems are the most common type, consisting of pipes that are filled with water at all times. This design allows for immediate water flow when the sprinkler head is activated, making it efficient for quickly addressing a fire.

On the other hand, dry pipe systems have pipes that are filled with pressurized air rather than water. This system is typically used in areas where temperatures can drop below freezing, preventing water from freezing in the pipes. When a sprinkler head activates, the air pressure drops, allowing the water to flow from the pipes.

Understanding the differences between these two systems is crucial for selecting the appropriate fire protection solution for specific building needs, especially considering environmental factors and the nature of potential hazards.