For decades, we manufacture manholes already according to DIN 83402 in all forms and on request, we manufacture also special sizes.

For quality and documentation assurance – for welding process 783 – bolt welding with short arc ignition and ceramic ring,

we have written extra VWPs and sent it to Germanischen Lloyd for certification.

We can supply not only steel manholes, but also from 1.4571 (V4A) or AlMg3 (aluminum).