Sta-Rite U109-93SS Swimming Pool Pump Shaft Seal

Sta-Rite U109-93SS is a 5/8-inch shaft seal made with Buna-N elastomer, intended as a direct replacement for Sta-Rite PLBC series pool pumps produced before 1995. Retail and pool-supply listings indicate it is suitable for Sta-Rite Dura-Glas and Max-E-Glas pumps manufactured before 1998, when those models used a 5/8-inch shaft seal. As a mechanical seal, it prevents water from leaking along the pump shaft where it passes through the housing, helping maintain pump efficiency and reducing leakage at the drive end. Because it targets older Sta-Rite equipment, this U109-93SS is commonly used in residential pool pumps with pre-1998 Sta-Rite technology; verify compatibility with your specific model before replacement.