General Rubber’s non metallic dismantling expansion joints are self retracting and provide longitudinal adjustment in the piping system. They further provide all directional movement and easy access to piping and equipment. The unique aspect of this restrained design is that it can be locked within its longitudinal adjustment range, eliminating the need for complex anchoring systems. The non metallic dismantling expansion joint can be an important element of an optimal system design for fast and simple subsequent maintenance of valves, pumps and other equipment.