Flexible PVC Pipe Couplings are used for connecting Sewer & Drain and DWV Piping Systems to a variety of Piping Systems. Used for all types of in-house and sewer connections: drain, waste, vent piping, house-to-main, repairs, cut-ins, conductor and roof drains and increasers-reducers and expansion joints. Made of superior elastomeric (PVC) poly-vinyl chloride.They are resilient, highly recommended, and unaffected by soil conditions.The dimensional flexibility of Dallas Specialty couplings ensures leakproof seals on virtually any pipe material: plastic, cast iron, asbestos cement, clay concrete, steel, fibre and ductile iron. These transistion couplings will meet your needs for your piping connections.