What is the function of an eductor in damage control?

• A. To seal openings
• B. To measure water depth
• C. To inject foam
• D. To create suction using motive force (steam, air) to move water out of a space for dewatering

Answer: (D)

An eductor creates suction by using a motive fluid (steam or compressed air) that passes through a nozzle at high speed. This jet generates a low-pressure region inside the eductor—the Venturi effect—so it draws water from the surrounding space into the eductor. The water is then carried away with the motive fluid in the discharge line, enabling dewatering without a powered pump. This makes eductors especially useful in damage control when electrical pumps aren’t available. They don’t seal openings, measure water depth, or inject foam—their job is to create suction and move water out of a flooded space.