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Storm water networks

Site drainage: storm sewers, gullies, soakaways and retention tanks.

Scope of work

  • Storm sewers in concrete and plastic pipe, including large diameters
  • Road gullies, catch basins and sand traps
  • Soakaways and infiltration drainage
  • Retention tanks and retention-infiltration tanks
  • Oil separators and settling chambers
  • Linear drainage of yards, car parks and roads

Who we work for

Industrial and logistics investors — drainage of manoeuvring yards and car parks, large-diameter sewers, separators ahead of the outfall.

Developers — retention on the plot instead of discharge into the sewer, in line with the connection conditions and the water permit.

Municipalities — road drainage and upgrades of sections that no longer cope with cloudbursts.

How we do it

There is more and more storm water, and less and less permission to send it into the sewer. So we start with where the water is to go: into a retention tank, into the ground through infiltration, or to the outfall through a separator. Everything else follows from that decision — diameters, gradients and tank size. Precast units are set with a crane, and the excavations for the chambers are shored.

We describe the full sequence — from survey to handover — on the home page.

Our work

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Questions we get most often

Do you build retention tanks?

Yes, both precast tanks and infiltration tanks built from crates. We install them with our own equipment, including unloading the units.

When is a separator needed?

For drainage of car parks, manoeuvring yards and fuel stations — anywhere petroleum substances can reach the storm water. The requirement comes from the water permit.

Can rainwater be discharged into the ground?

That depends on the permeability of the soil and the groundwater level. We choose the solution after reviewing the geotechnical survey of the plot.