Genuine Pentair replacement union o-ring for select Pentair / Sta-Rite pool and spa filters. Fits Sta-Rite System 3 modular media pool and spa cartridge filter models S7M120, S7M400, S8M150 and S8M500. Also compatible with System 3 SE series D.E. pool and spa filter models S7D75 and S8D110.
Manufacturer part number: U9362 / U9-362.
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