Atmospheric-type foam concentrate outlets shall be located to accomplish what purpose?

Atmospheric-type foam concentrate outlets shall be located to accomplish what purpose?

• A. Located at top
• B. Located to prevent sediment from entering the system
• C. Located near the vent
• D. Located close to pump suction

Answer: (B)

Atmospheric-type foam concentrate outlets are positioned to keep sediment from entering the foam-water solution. Sediment can settle in the concentrate storage and, if drawn into the line, can clog the proportioner, valves, and piping, or degrade foam quality. By locating the outlet so it draws concentrate from a portion less likely to contain settled solids (typically away from the bottom), you minimize solids entering the system and help ensure reliable foam production. The other placements don’t specifically prevent sediment ingress and thus don’t address this core maintenance need.

Atmospheric-type foam concentrate outlets are positioned to keep sediment from entering the foam-water solution. Sediment can settle in the concentrate storage and, if drawn into the line, can clog the proportioner, valves, and piping, or degrade foam quality. By locating the outlet so it draws concentrate from a portion less likely to contain settled solids (typically away from the bottom), you minimize solids entering the system and help ensure reliable foam production. The other placements don’t specifically prevent sediment ingress and thus don’t address this core maintenance need.