The largest WaStop Non-Return Valve ever installed in Finland

The problem

The areas Pikku Huopalahti and Vanha Ruskeasuo in Helsinki were subject to rather old pipes from the 1930’s and 60’s that had leaking issues and were in need of renovation. As part of the project, a new and larger NPS 64 stormwater system WaStop Inline check valve was designed to alleviate future potential surface water floodings in the area due to more frequent and increasing precipitation rates along with the possibility for increased new developments in the areas in the future.

The new NPS 64 pipeline evacuates the stormwater to the sea and with the risk of rising sea levels a non-return valve was to be installed to help protect the area from flooding. With limited space for installation since the pipeline runs through apartment complexes, roads as well as a bicycle and pedestrian path just upstream the outfall, close collaboration between all parties was required to come up with a solution that would ensure a cost-effective and time efficient installation for the contractor.