Self-supporting concrete concealed gutters

Concealed gutters are a perfect solution for water drainage because they are invisible and do not disrupt the aesthetics of a building or site. Concrete concealed gutters are made of durable material and have a high capacity to drain rainwater. They are often used on industrial projects, where water drainage can be a major problem. The concrete ensures that the gutters can withstand heavy loads and extreme weather conditions. Concrete concealed gutters are available in various sizes and shapes, making them suitable for different types of applications. Installing concealed gutters is a specialist job and requires expertise and precision. It is therefore advisable to have this carried out by a professional. Concealed gutters are a smart investment for any project that suffers from flooding and is looking for an invisible solution.

What are the differences


Concealed concrete gutters are made of concrete, which means they are durable and strong. Concrete is a material that can withstand heavy loads and weather influences, making concealed concrete gutters suitable for both indoor and outdoor use.


The cost of concealed concrete gutters can vary depending on the size and design of the gutter. In general, concrete concealed gutters are slightly more expensive than other materials, but this is because concrete is a durable material that will last a long time.

Number of sizes available

Concealed concrete gutters are available in different sizes and designs, making them suitable for different applications. Whether you need a small or large gutter, there is a size available to suit your needs.

Areas of application

Concealed concrete gutters are often used for site drainage and for industrial applications.


One of the main advantages of concealed concrete gutters is their durability. Concrete can withstand heavy loads and weather influences, meaning the gutter has a long lifespan without requiring much maintenance. This makes concealed concrete gutters a cost-effective solution for water drainage.

What does hidden gutter mean?

Concealed gutters are a smart solution for draining water without a traditional gutter being visible. These gutters are made of concrete and are integrated into the floor in an invisible way. This ensures efficient drainage of water, without compromising the appearance of the room. Concrete concealed gutters are becoming increasingly popular due to their many benefits. They can be installed in both indoor and outdoor spaces and are suitable for various types of floors. Plus, they are durable and long-lasting, making them a long-term investment. Another advantage of concealed gutters is that they are easy to clean. Because they are fully integrated into the floor or wall, there are no edges where dirt and dust can accumulate. This makes cleaning the room a lot easier. In short, concealed concrete gutters are the perfect solution for those looking for an efficient and invisible way to drain water. They are durable, easy to clean and suitable for various types of floors and terrains.

Advantages of concealed gutters compared to open gutters

Concealed gutters are an excellent solution for efficiently draining rainwater. Compared to open gutters, concealed gutters offer several advantages. The first advantage is that there is less chance of blockages. This is because concealed gutters are a closed system and are therefore less likely to fill up with leaves and other debris. This ensures that the water drainage continues to function optimally and that no nuisance arises. Another advantage of concealed gutters is that they are safer for pedestrians and cyclists. Open gutters can cause dangerous situations, for example when someone accidentally steps or cycles into them. This risk is much smaller with concealed gutters because they are completely concealed in the ground. This means they are not visible and cannot be accidentally damaged. Finally, concealed gutters also offer better drainage. Because they are completely concealed in the ground, water can drain better and no puddles form on the street. This ensures a safer and more pleasant living environment. In short, concealed gutters are a smart choice for those looking for a durable and effective water drainage solution.

Maintenance and cleaning of concealed gutters

Maintenance and cleaning of concealed gutters are important to ensure the proper functioning of the system. The frequency of maintenance depends on the environment in which the concealed gutters are located. In a densely built-up environment with many trees and leaves, maintenance will be required more often than in an open environment without trees. In general, it is recommended to perform maintenance on the concealed gutters once a year. The cleaning method for concealed gutters depends on the material the gutters are made of. Concrete concealed gutters can be cleaned using a high-pressure washer. The dirt is sprayed away from the gutters with high pressure. It is important to proceed carefully to avoid damage to the gutters. It is also important to collect the dirt and dispose of it responsibly. Another method to clean hidden gutters is to use a special cleaning robot. This robot can drive through the gutters and suck up the dirt. This is an effective and efficient way of cleaning, but it is important to check whether the gutters are suitable for this method. Regular maintenance and cleaning of concealed gutters is essential for proper functioning of the system. By doing this in a timely manner, you prevent blockages and possible damage to the gutters. This way the system remains invisible, but does its work effectively.

Applications of concealed gutters in various construction projects

Concealed gutters are a perfect solution for water drainage in various construction projects. They are frequently used in public spaces such as squares and shopping centers, in port areas, industrial areas and at gas stations. But you can also place them at loading bays, parking lots, tunnels, airports or shopping centers. In short: plenty of options. Due to the invisible location of the gutters, the street scene is not disturbed and the space remains accessible to pedestrians and wheelchair users. In addition, concealed gutters are also ideal for industrial buildings. In these buildings it is very important that the floors remain dry to ensure the safety of employees. Concealed concrete gutters offer a solution here, because concrete is a strong and durable material that can withstand heavy loads and intensive use. In short, concealed concrete gutters are an ideal solution for water drainage in various construction projects, from public spaces to industrial buildings.

Installation of concealed gutters in concrete surfaces

Before the concealed gutters can be installed, it is important to properly prepare the concrete surface. This means that the surface must be cleaned and any damage must be repaired. In addition, a slot must be made in which the concealed gutter can be placed. After the preparations have been made, the concealed gutter can be placed in the concrete. It is important to position the gutter properly and ensure good drainage. The trench can then be closed again with concrete. Finally, a finish must be applied around the concealed gutter. Consider expansion joints. All in all, installing concealed gutters in concrete surfaces is a smart and invisible solution for water drainage. By following the right steps and applying a good finish, a beautiful and functional result can be achieved.

Regulations and standards regarding the use of concealed gutters

Regulations and standards regarding the use of concealed gutters are of great importance to comply with the applicable requirements. However, these standards depend on the application and location where the concrete concealed gutters are placed. For example, different standards apply to outdoor applications than to indoor applications. Examples of standards that may apply to concealed gutters are EN 1433 and NEN-EN 1253. It is therefore important to look carefully at the applicable regulations and standards when choosing concealed gutters, so that no problems arise. By choosing the right concealed gutters, water drainage problems can be solved in an efficient and invisible way.

DWTN is the importer of the Delta-O concrete concealed gutters. These self-supporting concealed gutters (I series) are available in traffic class D, 400KN to F, 900KN and have been tested according to EN 1433.
The Delta program also consists of cable ducts Delta-T and grid ducts Delta-U .

The Delta-O concealed gutters can be installed with a concrete intermediate bridge and concrete edging , steel intermediate bridge and concrete edging , concrete intermediate bridge and steel edging or with a steel intermediate bridge and steel edging .




Concrete intermediate bridge, concrete border
Steel intermediate bridge, concrete rim
Concrete intermediate bridge, steel rim
Steel intermediate bridge, steel rim


Gutter types M & I in accordance with NEN EN 1433

A European harmonized standard, NEN EN 1433, applies to line drainage.
Various gutter types are described in this standard.
A distinction is made between gutter elements that must be installed without a foundation and concrete casing (gutter type I) and those with a concrete foundation and casing (gutter type M).
Many of the gutter systems supplied in the Netherlands are of the so-called type M.
In contrast to type I, installation of type M must be carried out carefully. Each supplier refers to the relevant installation instructions.
In fact, the drainage channel is only suitable for the specified traffic load when it is covered with the prescribed quality and quantity of concrete.
The use of gutter type I saves considerably on installation time and the load capacity is no longer dependent on installation with concrete.
By means of a so-called DoP statement and a marking on each gutter element, you can immediately see which type it is.

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