Which of the following is NOT a function of a foot valve?

A foot valve is a type of check valve that is typically installed at the end of a suction line and is submerged in water. Its primary functions are crucial for the proper operation of a pump.

Preventing backflow is essential for maintaining the integrity of the system. A foot valve allows water to flow into the pump when it is operating but prevents water from flowing back into the source when the pump is shut off. This function is vital for ensuring that the system continues to operate efficiently and without interruptions due to backflow.

Maintaining pump priming is another critical function. By keeping the suction line full of water, the foot valve prevents air from entering the system, which could lead to cavitation or loss of prime in the pump. This helps ensure that the pump can start successfully after being turned off.

Ensuring system pressure is not a direct function of the foot valve. While a properly functioning foot valve contributes to maintaining system integrity and effective operation, it does not inherently control or regulate the system pressure.

Controlling flow rate involves adjusting the amount or speed of fluid moving through a system, which is typically managed by other components such as flow control valves or pump speed variations, rather than a foot valve.

In summary, while a foot valve