Defines the performance requirements for flexible couplings and adaptors and bushes for use with pipes and fittings in drain and sewer systems, usually operated under gravity and periodic hydraulic surcharge, both above and below ground inside or outside buildings and intended to connect pipes for: - repair of damaged pipelines; - connecting pipes of different materials and/or diameters; - jointing short/cut lengths of pipe; - jointing specific pipe systems; - jointing post-inserted preformed junctions.