What percentage of a CAFS solution consists of water?

In a Compressed Air Foam System (CAFS), the solution is primarily composed of water, which serves as the base for creating the foam. The correct answer indicates that 99.5% of a CAFS solution consists of water. This high percentage underscores the importance of water in firefighting applications, as it acts not only as a carrier for the foam concentrate but also plays a crucial role in cooling the fire and suppressing flames.

The remaining portion of the solution typically includes foam concentrate and air, allowing the system to create a stable foam that expands and adheres to surfaces. This balance is essential for effective fire suppression. Understanding this composition helps firefighters appreciate the efficiency and effectiveness of CAFS in various firefighting operations, emphasizing the significant role water plays even within foam solutions.