What is the discharge time for the 4A backpack pump?

• A. 60-180 seconds
• B. 30-60 seconds
• C. 120-240 seconds
• D. 600-1800 seconds

Answer: (A)

Discharge time is how long the unit can continuously discharge water from its contained supply before it runs dry. It depends on how much water the pack holds and the flow rate you’re delivering at the nozzle.

For the 4A backpack pump, the typical setup carries about 4 gallons (roughly 15 liters) of water. At standard attack flows and nozzle settings, that amount is exhausted in about a minute or two, which places the discharge time in the 60–180 second range. This range reflects the usual balance of tank size and achievable flow in normal operation.

If you opened the nozzle wider to increase flow, the discharge time would shorten; if you used a smaller flow, it would lengthen. The other options imply durations outside what the equipment and standard operating conditions produce, so the range of 60–180 seconds is the best fit.