What is back suction?

Back suction refers to a phenomenon in fluid dynamics where a fluid is drawn back into a system, often due to pressure differences. This can occur in various contexts, such as in vacuum systems or during the operation of certain pumps. It may lead to unintended consequences, such as contamination or disruption of flow, and is typically mitigated through proper design and maintenance practices. Understanding back suction is crucial in engineering applications to ensure system efficiency and safety.