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 Fountain pumps can be classified into types based on a number of factors: operating method, application, and whether the pump is external or submersible. External vs. Submersible Fountain pumps can also be either submersible or external. Submersible pumps have the pump motor hermetically sealed in the pump body, allowing the entire system to be submerged within the water reservoir or water source. These pumps are easier to install than external pumps, and typically are less expensive. External pumps may require a more involved setup to install, but are generally more efficient. For turning larger ponds and reservoirs, this means noticeably lower operating costs. External pumps are almost always better suited to handle the back pressure associated with the use of a pressurized external filter. They are easier to clean and repair, and the also generally last longer.