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See larger image. Zodiac PB4-60 Polaris Booster Pump with 60-Hertz Motor The power behind Polaris, the PB4-60 delivers high-performance power, quiet operation, and Polaris durability. For over 20 years Polaris pressure pumps have been the benchmark for powerful Polaris Cleaner performance. Polaris pressure pumps are specifically designed to operate your cleaner at Optimum Cleaning Efficiency. The compact, rugged design allows for maximum performance. At a Glance Easy pump seal replacement Heavy duty single piece base Captured backplate nut fasteners Ergonomic drain plug with o-ring Larger volume seal o-ring