Unisource metallic retaining rings are designed for use on all elastomeric expansion joints with duck and rubber flanges. Metallic retaining rings must be used when connecting the rubber flanges of expansion joints to the mating piping system flanges.
Retaining rings consist of split circular sections of 3/8” thick carbon steel or stainless steel, drilled to match the expansion joint flanges. Edges are chamfered. Retaining rings are zinc plated or galvanized. Sizes range from 1/2” to 144”. Constructed to meet FSA Rubber Expansion Joint Division standards.