Plastics piping systems for soil and waste discharge (low and high temperature) within the building structure. Unplasticized poly(vinyl chloride) (PVC-U). Specifications for pipes, fittings and the system|Recycling, Waste-water drainage, Diameter, Dimensions, Water supply and waste systems (buildings), Impact strength, Marking, Pipe fittings, Performance, Physical properties of materials, Thickness, Polyvinyl chloride, Spigot-and-socket joints, Mechanical properties of materials, Length, Pipework systems, Pipes, Drainage, Plastics, Size, Sealing rings, Unplasticized polyvinyl chloride