Water drainage in public areas is simple, but it is important enough to still cause a headache or two. If you don’t have a good system in place, flooding after rain will be frequent and may cause a number of issues.

What happens if you want a solution that almost goes unnoticed and you need the drainage to be concealed?

ULMA proposes a simple solution that allows you to add a discreet detail to your projects – their concealed drainage system with slot drainage.

This grating forms part of a comprehensive system consisting of the grating, the channel and accessible sump unit assembly.

The system stands out at first glance as it does not affect the overall visual aesthetics, managing to conceal the drainage system installed.

This aspect is key when working in historic areas or on new housing developments that require clean and sophisticated lines. It is ideal for paved areas, natural stone or concrete paving.

It is a simple way of ensuring that the water collection system goes unnoticed, fully camouflaged in the urban landscape.

The single-slot grating has an inverted T shape and can be made of galvanized or stainless steel. It has a slot-shaped collection area that can be either single (15mm wide) or double (26mm wide). It also supports a D-400 load type according to the EN1433 standard.

There is also an option of a lateral grating, in an L shape, for areas close to walls. The single-slot grating is versatile and suitable for roadways, pedestrian streets and parking areas.

What is the hydraulic capacity? Is it its collection flow?
This will vary depending on the model installed, but ranges from 150 cm2/ml to 240 cm2/ml, which is what the double-slot grating collects.

How is the system maintained and cleaned?
The installation of clip-on manholes is required for maintenance and cleaning of the concealed drainage system. They are made according to the same material characteristics and dimensions, allowing them to be taken off in order to remove sediment, blockages or to carry out the necessary maintenance.

If you would like to know more about slot drainage, you can contact ULMA here.

ULMA can help you to choose the best drainage system optimised in cost and drainage capacity. Their technical service department offers a hydraulic study for each project and defines the most suitable channel for your project and for your client.

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