A hand pump is a simple mechanical device used to move liquids, typically water, from one place to another. It operates by creating a vacuum or pressure through manual effort, allowing the user to draw water from a well, a barrel, or other sources. Hand pumps are often made of durable materials like metal or plastic and can be found in various designs, including piston and diaphragm types. These pumps are commonly used in rural areas, gardens, and emergency situations where electricity is unavailable. They are also eco-friendly, as they do not require electricity or batteries. Hand pumps are an essential tool for accessing water in many parts of the world, especially in regions with limited infrastructure.