This British Standard specifies materials, dimensions and performance requirements for plastics WC connectors designed to connect horizontal outlet WC pans complying with BS 5503 : Parts 1 and 2 or BS 5504 : Parts 1, 2 and 3 to discharge pipework systems of various materials complying with BS 65, BS 416, BS 437, BS 602 & 1085, BS 1387, BS 2598, BS 2760, BS 2871 : Part 1, BS 3868, BS 4514 and BS 4660. NOTE 1. See foreword regarding connectors made of unplasticized polyvinyl chloride (uPVC). NOTE 2. The titles of the publications referred to in this standard are listed on page 9.