Which statement describes the color coding for AFFF solution valves?

• A. They are Red and Blue
• B. They are Red and Green
• C. They are Yellow and Blue
• D. They are White and Red

Answer: (B)

Color coding helps operators identify the parts of the AFFF transfer system at a glance, reducing mistakes during setup and operation. Using two distinct colors for the AFFF solution valves makes it quick to tell which valve controls the foam concentrate path and which handles the other part of the flow. Red and green are chosen because they provide a high-visibility, clear contrast, so the two valves are easily distinguished under emergency or drill conditions. Always check the site’s color legend for the exact mapping, but red and green as a pair is the standard way to mark AFFF solution valves.