U.S. Seal PS-3869 Shaft Seal Assembly The U.S. Seal PS-3869 is designed for pools and hot tubs that are using Salt Generators or Ozonators. These applications require tough seals due to there more corrosive nature. :5/8″ ShaftViton / Graphitic Plastic SS with Polished Ceramic SeatIndustry Standard for Pool and Spa Applications with Salt Generators and Ozone Generators U.S. Seal PS-2131 Shaft Seal Assembly :5/8″ ShaftPremium SealBuna / Graphitic Plastic SS with Ceramic SeatIndustry Standard for General Pool and Spa Applications Also Replaces:U.S. Seal VG-2131U.S. Seal PS-2131U.S. Seal PS-4275U.S. Seal PS-1906Aqua-Flo 91049000Hayward SPX1500KAAladdin AS-2131
