With the award of the RAL-GZ 961 quality mark for sewer construction, assessment group S27.5, we have reached an important milestone in the consistent quality assurance of our services for our BB2.5 VERTICAL manhole liner. This mark documents the continuous and successful testing of compliance with the requirements defined between the client and the contractor for the technical qualifications of specialist companies.

The quality assurance system combines continuous self-monitoring with independent external monitoring.

As part of our self-monitoring, we are obliged to document and check all work steps in accordance with the manufacturer's specifications and applicable regulations.

This is supplemented by external monitoring, in which a test engineer regularly checks the construction and renovation measures carried out, as well as the materials used, the equipment technology employed and the qualifications of the specialist personnel.

Particular emphasis is placed on the system testing of the entire process. Only if the materials, installation methods, equipment technology and specialist personnel can be proven to comply with recognized technical standards can our services continue to be labelled with the sewer construction quality mark.

For our clients, the sewer construction quality mark means maximum safety, as ongoing tests prove that we have the necessary technical qualifications.

For us, the quality mark is a binding promise of quality and an expression of our commitment to always work according to the latest state of the art.

We are proud of our great product, the BB2.5 VERTICAL, and of our team led by Stefan Blenke, who has made our manhole liner what it is today: the market leader, tried and tested a thousand times over.