DS EN 14758-1:2012 Plastics Piping Systems For Non-Pressure Underground Drainage And Sewerage - Polypropylene With Mineral Modifiers (Pp-Md) - Part 1: Specifications For Pipes, Fittings And The System Defines the requirements for solid-wall pipes, fittings and the system of piping systems made from mineral modified polypropylene materials (PP-MD) in the field of non-pressure underground drainage an