NF T54-062-1:1999 Plastics piping systems for soils and waste discharge (low and high temperature) within the building structure - Polypropylene (PP) - Part 1 : specifications for pipes, fittings and the system.
1999NF T54-062-1:1999 Plastics piping systems for soils and waste discharge (low and high temperature) within the building structure - Polypropylene (PP) - Part 1 : specifications for pipes, fittings and the system.