PerformancePro Cascade External Pond Pump is a high efficiency, industrial grade pump. Ideal for your pond, waterfalls feature, or general transfer and recirculation needs " Cascade pond pumps produce excellent flow rates at sufficient pressure (head) to really get the job done. The industrial grade polypropylene housings are built for long term use. A strainer pot may be attached to facilitate priming in a suction lift application and to strain debris from the inflow.