Back pull-out design allows entire motor to be removed for servicing impeller, seal or motor without disturbing plumbing Suitable for outdoor installation Precision cast and machined bronze impeller is dynamically balanced for long seal life and quiet operation Single-phase motors: Automatic reset NEMA® Listed, JM construction D Series™ pumps are 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 centrifugal pumps are available in high head and medium head models with motors from 3-5 HP to provide a complete range of performance characteristics. Motors are open drip-proof, continuous duty rated at 3450 RPM. A self-priming, high performance pump for semi-commercial and commercial swimming pools and spas. Features: Back pull-out design allows entire motor to be removed for servicing impeller, seal or motor without disturbing plumbing Suitable for outdoor installation Precision cast and machined bronze impeller is dynamically balanced for long seal life and quiet operation. Non-overloading 200 Volt models available 2", 21⁄2" or 3" suction port and 11⁄2", 2" or 21⁄2" discharge port Carbon steel inside a 300 Series stainless steel sealed removable shaft sleeve NEMA® Listed, JM construction Single-phase motors: Automatic reset