What is the maximum foam solution flow concentrate percentage for 200 GPM water flow?

Foam solutions are critical for effective firefighting, particularly for Class B fires involving flammable liquids. The maximum foam concentrate percentage is determined based on the flow rate of water used to generate the foam, ensuring that the resulting mixture is effective for extinguishing fires.

For a water flow rate of 200 gallons per minute (GPM), utilizing a higher percentage of foam concentrate could lead to an inadequate foam blanket, reducing its effectiveness. The industry standard typically permits a foam concentrate percentage of up to 6% when working with a flow rate like 200 GPM. This allows for sufficient coverage and allows the foam to form properly, maintaining the properties necessary to suppress fire effectively.

The correct answer aligns with these firefighting practices, as higher percentages may not create the ideal foam composition needed for optimal performance while ensuring safe and effective firefighting operations. It's essential for the firefighter or driver engineer to adhere to these standards to ensure safety and effectiveness in the field.