Why is a check valve installed after a pump?

Installing a check valve after a pump serves the critical function of preventing backflow in the system. When the pump is operating, it creates pressure that allows fluid to flow in a desired direction. However, if the pump stops or if there is a sudden drop in pressure, there’s a risk that the fluid could reverse its flow. This backflow could lead to several problems, such as damage to the pump, contamination of the fluid, or disruptions in system operation.

The check valve's design allows fluid to flow in only one direction, thereby safeguarding the pump and the rest of the system from potential issues caused by backflow. This setup ensures that once the fluid has been pumped out, it cannot return through the pump, maintaining the system's integrity and efficiency.

While the other options might touch on concepts relevant to pump operation, they do not directly relate to the specific role of a check valve in preventing backflow after a pump.