What device is installed on the suction pipe of a pump to prevent water from draining back?

What device is installed on the suction pipe of a pump to prevent water from draining back?

• A. Globe valve
• B. Foot valve
• C. Pressure relief valve
• D. Corporation stop

Answer: (B)

The device installed on the suction pipe of a pump to prevent water from draining back is a foot valve. This valve is specifically designed to maintain the water column in the suction line when the pump is turned off, preventing backflow. It operates using a check valve mechanism that allows water to flow into the pump but not out again, ensuring that the pump remains primed and ready to operate when needed. Foot valves are commonly used in applications where pumps are located below the level of the water source, as they are essential for maintaining the prime and ensuring that the pump can easily draw water without losing suction. This functionality is critical in water distribution systems to ensure reliable and efficient operation of pumps. Other devices listed do not serve this specific function: a globe valve controls flow but does not prevent backflow; a pressure relief valve is used to relieve excess pressure and protect equipment; and a corporation stop is employed for isolating sections of a water pipeline but does not deal specifically with preventing backflow in suction lines.

The device installed on the suction pipe of a pump to prevent water from draining back is a foot valve. This valve is specifically designed to maintain the water column in the suction line when the pump is turned off, preventing backflow. It operates using a check valve mechanism that allows water to flow into the pump but not out again, ensuring that the pump remains primed and ready to operate when needed.

Foot valves are commonly used in applications where pumps are located below the level of the water source, as they are essential for maintaining the prime and ensuring that the pump can easily draw water without losing suction. This functionality is critical in water distribution systems to ensure reliable and efficient operation of pumps.

Other devices listed do not serve this specific function: a globe valve controls flow but does not prevent backflow; a pressure relief valve is used to relieve excess pressure and protect equipment; and a corporation stop is employed for isolating sections of a water pipeline but does not deal specifically with preventing backflow in suction lines.