Which component provides AFFF from any fire station?

• A. AFFF concentrate storage tank
• B. AFFF In-line eductor
• C. Foam nozzle assembly
• D. High-pressure water supply

Answer: (B)

What makes foam available from any fire station is the device that injects AFFF concentrate into the water stream as it flows. The AFFF in-line eductor uses the venturi effect to draw concentrate from its supply into the water line when water is flowing. This suction-capable mixing happens right at the point of discharge, so any fire station equipped with an eductor can produce foam on demand, delivering it through the nozzle.

The concentrate storage tank simply holds the foam concentrate and cannot by itself deliver foam to a station. The foam nozzle assembly handles discharge but does not mix concentrate into the water. The high-pressure water supply provides the driving force for the system, but without the in-line eductor, the concentrate wouldn’t be introduced into the water stream.