Water is absolutely essential for the survival of human beings, animals, plants, and all other living beings. Water is the most abundant compound in nature. It covers 75% of the earth surface. The various sources of water available on the earth can be divided into the following two categories: surface source and subsurface source. The surface sources are further divided into streams, rivers, ponds, lakes, impounding reservoirs, and so on. The subsurface sources are further divided into infiltration galleries, infiltration wells, springs, and wells. Pumps are helpful in pumping water from the sources, that is, from intake to the treatment plant and from treatment plant to the distribution system or service reservoir. Based on the mechanical principle of water, lifting pumps are classified as the follows: displacement pumps, velocity pumps, buoyancy pumps and impulse pumps.