Which AFFF stations are injection pump only?

Which AFFF stations are injection pump only?

• A. Stations 7-10
• B. Stations 3-6
• C. Stations 13-16
• D. Stations 1, 2, 11, and 12

Answer: (D)

Injection pump only stations are those that exist solely to introduce foam concentrate into the foam solution, without drawing concentrate from storage or transferring concentrate between tanks. They provide a controlled injection point into the premix line and have no suction or transfer function. In this system layout, stations 1, 2, 11, and 12 are designated as injection-pump-only, meaning they are configured to inject concentrate and do not handle suction or transfer tasks. The other station groups include additional pumps for suction or transfer or serve different roles, so they are not injection-pump-only.

Injection pump only stations are those that exist solely to introduce foam concentrate into the foam solution, without drawing concentrate from storage or transferring concentrate between tanks. They provide a controlled injection point into the premix line and have no suction or transfer function. In this system layout, stations 1, 2, 11, and 12 are designated as injection-pump-only, meaning they are configured to inject concentrate and do not handle suction or transfer tasks. The other station groups include additional pumps for suction or transfer or serve different roles, so they are not injection-pump-only.