The Pentair 33455-8043 impeller-to-lock-washer gasket is designed for compatible pump service applications where the sealing component at that interface needs replacement. A gasket like this is useful because it helps maintain the intended fit and sealing relationship between related internal pump parts during reassembly.Replacement is often appropriate when the original gasket is worn, damaged, or no longer suitable after disassembly. Using the correct Pentair gasket can help restore the condition of the assembly and support a more careful rebuild.This OEM gasket is a practical internal service part for compatible Pentair pump repairs that require the correct sealing component at the impeller and lock-washer connection. OEM Pentair internal pump gasket Designed for the impeller-to-lock-washer interface Helps support proper internal sealing and fit Useful when the original gasket is worn or damaged Supports cleaner and more dependable pump service