The WaterFall™ Specialty Pumps are custom designed for the specific demands of waterfalls and other special water features. Our diffuser and impeller combination is engineered to deliver quiet operation in high flow and low pressure applications. That's why it's the pump most recommended by water feature manufacturers. With a closed Impeller this Single-Speed pump is custom designed for the specific demands of water features such as fountains, waterfalls, and other special pool features. This pump is 60% quieter, 60% less energy use than standard pool pump, and is designed for low head applications that require 35-180 GPMs.