A siphon pump is a simple device used to move liquids from one container to another without the need for a mechanical pump. It operates on the principle of gravity and atmospheric pressure. By creating a difference in height between the two containers, the liquid flows through a tube, allowing it to be transferred efficiently. Siphon pumps are commonly used in various applications, such as draining aquariums, transferring fuel, or emptying pools. They are easy to use and require minimal setup, making them a popular choice for both household and industrial tasks involving liquids.