Century A.O. Smith B2984 Square Flange 2 or 0.25 HP Dual Speed Full Rated 56Y Pool and Spa Pump Motor, 11.0/1.8A 230V. The Century A.O. Smith Pool and Spa Pump Motor has two speeds and employs a PSC (Permanent Split Capacitor) to improve efficiency up to 20%. Full-Rated with a low service factor and equipped with an auto overload protector and ball bearings, the Century Pool and Spa Pump Motor provides long lasting and trustworthy operation. The Century Pool and Spa Pump Motor delivers optimum performance, available with horsepower ratings ranging from 3/4-.10HP to 2-.33HP. This spa pump motor meets California Energy Commission Appliance Regulations 2008 for ultimate efficiency.