Historical
DIN EN 1401-1:1998
Plastics piping systems for non-pressure underground drainage and sewerage - Unplasticized poly(vinyl chloride) (PVC-U) - Part 1: Specifications for pipes, fittings and the system (Foreign Standard)
The document specifies the requirements for a piping system and its components made from unplasticized poly(vinyl chloride) (PVC-U).
Deutsches Institut für Normung [din]