The Stark gasket is designed for compatible Pentair THS filter grooved coupling applications where a dependable seal is needed. A gasket is useful because it helps create a tight barrier between connected filter components, supporting cleaner assembly and more dependable pressure-side performance.This replacement is especially useful when the original gasket is flattened, cracked, brittle, leaking, or no longer sealing correctly. Matching the correct 6 inch grooved coupling application helps preserve intended fit and restore dependable sealing support in the filter assembly.The B4886 is a practical service part when a compatible filtration setup needs a gasket to restore dependable sealing performance and cleaner long-term operation. Stark gasket Fits compatible Pentair THS 6 inch grooved coupling applications Helps restore secure sealing support Useful when the original gasket is worn or leaking Supports cleaner and more dependable filtration performance