Hand pumps are manually operated devices designed for transferring liquids from one container to another. They are commonly used in various applications where power sources are limited or unavailable. These pumps typically feature a lever or handle mechanism that users operate to create suction or pressure, allowing for the extraction or delivery of fluids. Hand pumps come in a variety of designs to accommodate different fluids, container sizes, and environments. They are valued for their simplicity, portability, and reliability, making them indispensable tools in industries such as agriculture, automotive, marine, and emergency response.