Century® STS1102RV1 2-Speed Two-Compartment Pool Filter Motor; 1/0.13 HP, 3450/1725 RPM, 230 V, 56J, Threaded Shaft. Century® NEMA C-Flange swimming pool filter pump motors are carefully engineered to meet the rugged demands of pool duty. Two sealed ball bearings (with large 304 bearing on shaft end) offer ample capacity for extended life. Bearings are selected for quietness and are lubricated for life with greases specifically chosen for moisture and heat resistant qualities. Aluminum end frames are accurately machined for maximum concentricity and minimum runout.