Which statement is true about check valves in the system?

Which statement is true about check valves in the system?

• A. All pumps require check valves
• B. Check valves are optional
• C. No check valves are needed
• D. Only duplex pumps require check valves

Answer: (A)

Backflow prevention is essential in pumping systems because water can push backward when the pump stops, demand changes, or pressure fluctuations occur. A check valve is a one-way device that allows flow in the intended direction and automatically closes if flow reverses. This keeps the pump from losing its prime and, just as important, prevents potentially contaminated water from flowing back into the supply. Since reverse flow can happen in any pumping setup, installing a check valve on every pump is best practice. Without it, backflow could occur, leading to loss of prime, water hammer, or contamination of the supply. The idea that a check valve is optional or only needed for certain pump configurations isn’t supported by how pumps interact with the rest of the system; even a single pump benefits from a check valve, not just duplex arrangements.

Backflow prevention is essential in pumping systems because water can push backward when the pump stops, demand changes, or pressure fluctuations occur. A check valve is a one-way device that allows flow in the intended direction and automatically closes if flow reverses. This keeps the pump from losing its prime and, just as important, prevents potentially contaminated water from flowing back into the supply.

Since reverse flow can happen in any pumping setup, installing a check valve on every pump is best practice. Without it, backflow could occur, leading to loss of prime, water hammer, or contamination of the supply. The idea that a check valve is optional or only needed for certain pump configurations isn’t supported by how pumps interact with the rest of the system; even a single pump benefits from a check valve, not just duplex arrangements.