A siphon pump is a simple device that utilizes gravity and atmospheric pressure to transfer fluids from a higher elevation to a lower point. It operates without the need for electricity or a motor. By drawing air out of a tube filled with fluid, a vacuum is created, allowing the fluid to flow. Siphon pumps are often used for transferring fuels, water, or other liquids between containers. They are popular in situations where an electric pump is not practical or possible due to cost or the lack of a power source.