The small return bypass water line that connects from the discharge side back to the intake side of the pump is described as which option?

• A. Return bypass line
• B. Bypass around the pump
• C. Around the pump proportional
• D. Recirculation line

Answer: (C)

The concept here is a loop that sends some of the water returning from the pump’s discharge back into the pump’s intake to keep water circulating. This is known as a recirculation line. It serves to maintain flow, prevent the pump from overheating, and assist with priming by keeping water moving through the pump even when downstream demand is low. While terms like “return bypass” or “bypass around the pump” describe the idea of bypassing, the standard name for this specific line is recirculation line. The option that uses a nonstandard or unclear phrasing isn’t the conventional term used in pump practice.