BS ISO 19469-3. Plastic piping systems for non pressure underground drainage. Single wall corrugated piping systems of polyethylene (PE), polypropylene (PP) and unplasticized poly(vinyl chloride) (PVC-U). Part 3. Pipes and fittings for deep burial installations|Length, Elastomers, Thermal stability, Impact testing, Performance, Polypropylene, Pipe fittings, Plastic pipelines, Spigot-and-socket joints, Thickness, Marking, Sealing rings, Dimensional tolerances, Flexibility, Plastics, Flow rates, Water supply and waste systems (buildings), Pipes, Mechanical testing, Thermoplastic polymers, Sewerage, Drainage, Size, Drop tests, WATER SUPPLY AND WASTE SYSTEMS (BUILDINGS), Pipework systems, Diameter, Underground, Stiffness