Plastics piping systems for water supply and for buried and above-ground drainage and sewerage under pressure – Unplasticized poly(vinyl chloride) (PVC-U) – Part 7: Guidance for the assessment of conformity; German version CEN/TS 1452-7:2014
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 05/01/2014
