New sewer systems must meet high requirements in terms of service life, cost efficiency, reliability with regard to chemical resistance, watertightness, and more. Thanks to their proven quality, international certification bodies have awarded quality marks such as KOMO, DIN, ATec, A.S.T.M., etc. In Bipeau three-layer PVC pipes, up to 60% of virgin raw materials are saved through the use of recycled material. Pipes and fittings released during demolition or replacement are taken back by the sector organisation FKS. This waste is reprocessed into usable raw material.