For a split sewer systems with a separate duct for rainwater. When there are large differences in the invert levels, the rainwater network is integrated in a manhole ring.
Depending on the local conditions, PREDL works with different rehabilitation methods. The development of modern rehabilitation methods for sewage manholes is one of our core competences.
With the FLEXLINER, trenchless manhole rehabilitation is possible within a very short time. The FLEXLINER is bent together for insertion into the manhole, undivided and free of damage, and then unfolded again to its original size in the manhole base.
The retrofittable polypropylene channel cover prevents annoying odour emissions and reliably protects the rising shaft area from corrosive attack by hydrogen sulphide.
A combination of the DUPLEX manhole and precast concrete manhole bases with monolithically cast-in PREDL manhole base-liner and plastic lining up to the first joint.