Abstract: A portable, reusable pipe coupling for connecting joints of cylindrical conduit which incorporates an annular body structure having sealed recesses formed at each extremity thereof. The end portions of the body structure define annular enlargements that are internally threaded and receive the externally threaded annular rim portion of a seal retainer element at each extremity of the coupling. The seal retainer element cooperates with a seal support member within the coupling body to define an annular seal chamber and an annular seal locking groove. An annular sealing element formed of resilient material is disposed within the seal chamber and is deformed by movement of the seal retainer relative to the coupling body, thus forcing the inner peripheral portion of the sealing element into sealed engagement with the ends of conduit sections that are located within the coupling body. The sealing element also incorporates an annular locking flange that is secured within the locking groove.