Pentair U9-228A O-Ring for Seal Plate Replacement for select Sta-Rite Pool and Spa Ingorund Pump O-ring for seal plate replacement Fits Sta-Rite IntelliPro variable speed pool and spa in ground pump and also fits with Sta-Rite Max-E-Pro pool and spa in ground pump series Fits with Sta-Rite Max-E-Glas/Dura-Glas and Max-E-Glas II/Dura-Glas II pool and spa in ground pump series for "Full Rate" and "Up-Rate" model