A siphon pump is a simple yet highly effective device used for transferring liquids from one container to another through the process of siphoning. The basic principle behind a siphon pump is based on gravity and atmospheric pressure. It typically consists of a tube with one end placed in the liquid to be transferred and the other end in the receiving container at a lower level. When the liquid in the tube is initially filled and the siphon action is started, gravity causes the liquid to flow from the higher level to the lower level, carrying along any liquid still in the tube. This continuous flow can be maintained as long as the outlet end remains lower than the inlet end and no air enters the tube to break the suction.

Siphon pumps are widely used in various applications due to their simplicity and cost-effectiveness. They are commonly employed in situations where pumps or electricity are either unavailable or impractical. For instance, siphon pumps are often used for transferring water, fuel, and other fluids in automotive and industrial settings, as well as in everyday household tasks, such as aquarium maintenance or emptying water from tanks and containers. The design of a siphon pump can vary, with some incorporating hand-operated mechanisms to start the flow, while others are as simple as a flexible hose. This versatility makes the siphon pump a valuable tool in both professional and home environments.