Irrigation pumps may be used for aesthetic reasons, such as keeping a patch of grass healthy, or may be used on a farm, where a family's livelihood depends on irrigation. Irrigation pumps can be powered by different sources. Most are powered by electricity that offers the convenience of a constant energy source as long as the service is available. For more remote areas, other fuel sources like gasoline, diesel or propane may be the only option. There are many different ways a pump can be used to get water from one location to another. These include, submersible pumps and centrifugal pumps. The centrifugal irrigation pump is the most common. Choosing the proper pump will often depend on the situation and the preference of the manager of the irrigation system. Cost is a major factor for many people. More important, however, is choosing a pump of the right size to do the job.