Fountain pumps are designed to supply the flow of water to fountains and devices used for aesthetic purposes and aeration in residential, commercial, and industrial applications. Fountain pumps may be configured for use indoors or outdoors and are typically differentiated by the size of the pool or pond and whether the application is decorative or functional. Some fountain pumps are even solar powered and can work in conjunction with a well pump to create special garden or landscape features such as waterfalls. Types of Pumps There are two main types of pond pumps: submersible and external (out-of-pond), also known as centrifugal pumps. Depending on the application, each pump offers specific advantages.