Dual pumping operations involve what configuration?

• A. Two pumpers connected intake-to-intake
• B. Two pumpers connected discharge-to-discharge
• C. One pumper charging a standpipe
• D. A single pumper with a booster hose

Answer: (A)

Dual pumping means pulling water from the same source with two pumpers, so their suction lines are tied together at the intake. This setup allows both pumpers to draw water simultaneously, effectively increasing the total amount of water available to the attack line beyond what a single pumper could deliver. The suction connection is made with a manifold or cross-connection on the intake sides, and equipment like large-diameter hoses, valves, and strainers are used to prevent backflow and maintain prime for both pumps. This configuration keeps both units feeding from the same source, which is why intake-to-intake is the correct description. Discharge-to-discharge, charging a standpipe with one pumper, or a lone pumper with a booster hose describe different arrangements that don’t define dual pumping on the suction side.