What is the primary function of a check valve on a pump's discharge side?

What is the primary function of a check valve on a pump's discharge side?

• A. Increase head
• B. Prevent backflow
• C. Filter debris
• D. Regulate temperature

Answer: (B)

A check valve on the pump’s discharge side is used to prevent backflow. It allows fluid to move forward but automatically closes if the flow tries to reverse, protecting the pump, piping, and downstream equipment from being pushed backward and helping maintain system priming. This function is essential in wastewater systems to avoid reverse flow and potential contamination. It does not increase head, filter debris, or regulate temperature, which are accomplished by other components.

A check valve on the pump’s discharge side is used to prevent backflow. It allows fluid to move forward but automatically closes if the flow tries to reverse, protecting the pump, piping, and downstream equipment from being pushed backward and helping maintain system priming. This function is essential in wastewater systems to avoid reverse flow and potential contamination. It does not increase head, filter debris, or regulate temperature, which are accomplished by other components.