Couplings for jointing and repairing pipes in sewerage, drainage, chemical, and low pressure applications; adaptor couplings for coupling pipes of different sizes; saddle connectors for coupling branch pipes to main pipelines; tee branch couplings for pipes; elbow bends for coupling pipes; bushes and liners for use in the jointing of pipes; flanges, sealing rings and end caps for use with pipes; all the aforesaid goods being wholly or substantially of polyvinylchloride, or thermoplastic or other synthetic, elastomeric material, or nitrile rubber