DS EN 13476-1:2007 Plastics Piping Systems For Non-Pressure Underground Drainage And Sewerage - Structured-Wall Piping Systems Of Unplasticized Poly(Vinyl Chloride) (Pvc-U), Polypropylene (Pp) And Polyethylene (Pe) - Part 1: General Requirements And Performance Characteristics Describes the definitions and requirements for pipes, fittings and the system based on unplasticized poly(vinyl chloride) (PVC-U), polypropylene (PP) and polyethylene (PE) structured-wall piping syste