DIN CEN/TS 13476-4 Plastics piping systems for non-pressure underground drainage and sewerage - Structured-wall piping systems of unplasticized poly(vinyl chloride) (PVC-U), polypropylene (PP) and polyethylene (PE) - Part 4: Guidance for the assessment of conformity; German version CEN/TS 13476-4:2013

standard by Deutsches Institut Fur Normung E.V. (German National Standard), 07/01/2013