What defines AFFF service in the system, including its color stripes?

• A. Provides AFFF concentrate. Color is striped blue/red
• B. Proportions AFFF concentrate and seawater and routes it to sprinklers and hose reels. Color is striped Red/Green
• C. Provides means to activate the system
• D. Hycheck

Answer: (B)

The main idea here is that AFFF service is the part of the foam system that mixes a fixed amount of AFFF concentrate with seawater and then delivers the resulting foam solution to the sprinklers and hose reels. That combination and routing are what actually suppresses fires, not just supplying concentrate or only providing an activation mechanism. The color stripes on the service line serve to identify this as the foam-service line, with red and green signaling that it’s the AFFF service path, which helps responders and maintenance personnel quickly verify the correct line is in use.