Waterscapes Inc. employs several types of pumping systems based on the application. Centrifugal pumps (typically swimming pool or spa pumps contained outside the system) are able to pump larger quantities (GPM) of water in proportion to electricity consumption. The pumps are usually contained in a pump house or underground vault and thus are sometimes easier to service. However heating, cooling, and noise/vibration usually require special and sometimes expensive considerations. We will typically use centrifugal pumps when water feature is to be used for swimming or when the required water volume would require too many submersible pumps. Submersible pumps (as the name implies) are submerged in a wet well or sump that is hidden along the far side of the lake. The pumps are thus protected from the winter freeze and the water muffles any sound or vibration. Although being submerged in water can make maintenance slightly more difficult we have developed ingenious ways to unfasten the pump from above that make them easier to remove or service.