If you live in a town or city, you probably don’t give much thought to how the water you use each day gets to your house. Even small villages often provide a network of supply pipes that transport water to each home in the neighborhood. All you need to know is how to open the tap at the sink. One thing for certain, a water pump is mainly utilized to decrease downtime from heavy rains and to move water from area to another. Move a few miles out of town and the situation can change. While the inner workings are still—thankfully—invisible, your water supply is independent from the neighbor’s down the road. It is often an idea for people who live less centrally or people who have a big garden to buy a water pump for garden irrigation. There is a wide range of water pumps on the market which makes choosing one difficult. It can be a confusing and time-consuming process.There are basically two types of water pumps: centrifugal pump and positive displacement pumps. Centrifugal pumps are a sub-class of dynamic axisymmetric work-absorbing turbomachinery. They are often used to transport fluids by conversion. A rotating impeller draws water into the pump and centrifugal action pressurizes the water for discharge. Positive displacement pumps draw fluid into a compartment at the inlet and move it to an outlet for discharge, most typically using a rotary, reciprocating, or diaphragm method to move fluid. Nearly all pumps fall within these two categories, with centrifugal being the most common. However, positive displacement pumps come in a wider variety such as gear, lobe, peristaltic, screw, and many other types of pumps.The main difference between these types of pumps and centrifugal is that positive displacement pumps come in a wider variety, but the centrifugal pump is still the most common.