CAST IRON SELF-PRIMING CENTRIFUGAL COMMERCIAL POOL PUMP Especially designed for commercial and public swimming pools and spas, aquatic facilities, water parks and fountain applications where high performance and self-priming characteristics are desired. These self-priming, high performance pumps are available in high head and medium head models, providing a complete range of performance characteristics. Motors are open drip-proof, continuous duty rated 3450 RPM. Strainer package sold seperately.