DS EN 1852-1:2009 Plastics Piping Systems For Non-Pressure Underground Drainage And Sewerage - Polypropylene (Pp) - Part 1: Specifications For Pipes, Fittings And The System Defines the requirements for solid wall pipes, fittings and the system of polypropylene (PP) piping systems intended for use for: - non-pressure underground drainage and sewerage outside the building