• 5/8" Shaft • Premium Shaft Seal • Buna / Graphitic Plastic SS with Ceramic Seat• Industry Standard for General Pool and Spa ApplicationsPS/PSR-1000 Shaft Seal Assembly• 5/8" Shaft • Premium Seal • Buna / Graphitic Plastic SS with Ceramic Seat• Industry Standard for General Pool and Spa ApplicationsPLEASE NOTE: Not Recommended in Pools or Spas with Ozonators, Bromine or Chlorine Generators. Systems with Ozonators, Bromine or Chlorine Generators Pool Pumps That Use The 1000 Series Mechanical SealJandy PB4-60StaRite CF/CFAStaRite HP-SeriesPentair WhisperfloPremier 455/456Premier 500/600Aqua-Flo A-SeriesAqua-Flo A & B SeriesAqua-Flo C-SeriesAqua-Flo D-SeriesAstral Pool Astramax Sena Series 1600Acura Spa Systems - Aquaheat Acura Spa Systems - Aquaheat Plus Acura Spa Systems - Magnaflow Acura Spa Systems - Magnaflow 56 Acura Spa Systems - MaverickAcura Spa Systems - SuperchargerAcura Spa Systems - Supercharger IIAmerican Products - Americana IIAmerican Products - Bronze-BronzeAmerican Products - EagleAmerican Products - MaxiumAmerican Products - Power GlassAmerican Products - Ultra-FloAmpro-Diaclear - Dura-FloAmpro-Diaclear - Noryl TurboAmpro-Diaclear - XL 600PS-1000 Replaces• U.S. Seal VG-1000 Value• U.S. Seal PS-961 Spas• U.S. Seal PS-3865 Ozone / Salt • U.S. Seal PS-1905 Silicone Carbide• Jandy PB4-60• Pentair 071734• Premier 31-813• Sta-Rite U109-136SS• American Products 397012• Aladdin AS-1000• Ampro-Diaclear AP-304D• Anthony 04380• Gecko Aqua-Flo 92500050• Gecko Aqua-Flo 92509040• Gecko Aqua-Flo 92500040• Astral Pool Series 1600• Doughboy 306-1002• Waterway 319-3100B