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Carefree sewer management, with respect for the planet and the climate!

The THIOTUBE® drainage channel consists of 100 % circular sulphur concrete (=THIOCRETE®), combining the robustness of a classic concrete sewage pipe with the acid-resistant properties of a plastic or ceramic tube. It meets all prescribed functional and technical requirements. The drainage channel is durable, chemically resistant and particularly suitable for waste water. Thanks to the use of CEMENT-FREE sulphur concrete, the impact on the climate and the environment remains extremely low. A circular revolution!

Why choose a THIOTUBE® drainage system?



100% circular

Sulphur concrete becomes liquefied again by melting it at 135°C. You can re-melt and reuse it infinitely, without any loss of value. Both the concrete and the other components can be reused again and again in an identical or new application, without sacrificing quality or performance.

No water usage

Not a drop of water is used for the production of sulphur concrete. Neither as raw material nor as process water during production (e.g. for cooling).

Icoon Hogesterktebeton

Long lifespan

Because sulphur concrete is hydrophobic, and so no water can penetrate it, it is physically very stable. Its acid-resistant and water-repellent character, combined with the material’s high mechanical strength (strength class 240), guarantees a very high life span, even in the most extreme conditions.

Low CO2 emissions

The CO2 emissions released during the production of drains and tubes from sulphur concrete are exceptionally low when compared with conventional cement concrete, grès or plastic. A product made of cement concrete emits twice as much CO₂ per ton than a ton of processed sulphur concrete. With grès, it is even four times more.

Harmless to the environment

THIOTUBE® sulfur concrete drainage tubes contain no toxic substances and do not leach out. The various forms of elemental sulphur are also insoluble in cold and hot water and thus do not enter the soil or groundwater. With the THIOTUBE® you choose a sustainable and ecological solution for our drainage system.


With THIOTUBE® you are ready for the future!

Find out more about our THIOTUBE range here


Acid resistance

High Strength


Thermal resistance



Abrasion resistance


• How are the connections between the pipes realised?

The connection between the pipes is achieved by means of a polypropylene push-in socket on both sides fitted with a rubber (EPDM) seal with integrated shear force protector. This connection meets the watertightness requirement of 1 bar from SB250.

• How are domestic connections realised on the THIOTUBE® sewer system?

The domestic connections can be realised by means of a connection socket mounted in a borehole with a diameter of 168mm. These holes are drilled in the factory and are thus covered by certification.

• What inspection options are available?

THIOTUBE® pipes are compatible with the sophisticated IDEAL access and connection manholes made of self-compacting concrete.

• How should I do with sulphur concrete residues?

THIOCRETE® is 100% circular and should be returned to the manufacturer. They will then reuse it as a primary raw material in the production of new materials.  After all, Thiocrete® is not a waste flow, but rather a primary residual flow. For this reason, avoid disposing of residual sulphur concrete to a crushing plant, whether combined with other rubble or not. Should small quantities still be crushed into rubble by a crushing plant, this does not pose any environmental or human health problems.

• How can I recognise a THIOTUBE® pipe?

The sulphur concrete pipes can be recognised by their distinctive orange polypropylene insert sleeves, which feature THIOTUBE®.

• Why does the THIOTUBE® tube have a separate sleeve?

This insert sleeve fits into the ‘design to disassemble’ principle, one of the basic principles within the circular economy. It ensures that the different parts can be separated at the end of their life. That means that each component enters its specific recycling programme.

This ensures that material cycles remain closed and materials are reused in their highest possible applications.

• Why is the seal in the sleeve not glued in place?

In a circular economy, it is important that components of different material types can be easily separated from each other. If this cannot be done, pollution occurs in the material cycles.  The EPDM sealing rings are therefore not glued into the sleeves for the sake of recyclability. They should be easily separable from the polypropylene coupling. Unglued seals does not imply any risk during installation. The seals are designed so that, together with the shear force protector and the longer cutting length, they are under compression in the cavity provided for this purpose and thus cannot be moved when the pipes are inserted.

• How are sulphur concrete pipes packaged?

THIOTUBE® pipes with an internal diameter of 250mm are packed on specially provided wooden beams, always in sub-batches of 2 layers, with 3 pipes per layer. Spacers are provided between the pipes. 2 sub-batches can be placed on top of each other during transport. A sub-batch weighs +- 1350 kg.

• Do you need to apply lubricant to the seal on insertion?

Lubricant should always be applied, preferably to the spigot of the pipe, or possibly to the seal in the coupling, if for some reason preferred by the contractor.

• Which quality mark applies to sulphur concrete pipe?

The THIOTUBE® system is Copro-certified as per PTV 823 Part 1 (manholes) and Part 2 (pipes and seals) and PTV 832-1 (rubbers).

• What is the expected service life of the sulphur concrete pipe?

The life expectancy of a THIOTUBE® pipe is very long. THIOCRETE® (circular sulphur concrete) is the result of a physical process in which such a stable and strong cohesion is obtained between the aggregates and the sulphur that the material becomes impregnable. The material is highly chemical resistant (pH 0-12) and hydrophobic (water impermeable and repellent). Years of intensive testing, both in labs and in practice, have shown that, even in the most extreme conditions, the material does not show any degradation. All the physical, chemical and mechanical properties are unchanging over time. We thus have realistic and solid arguments to believe that THIOTUBE® pipes achieve lifetimes that comfortably exceed the lifetimes (financial and operational residual) set by sewer operators.

• Has an LCA been prepared for a sulphur concrete pipe?

An LCA and an EPD have been prepared for the THIOTUBE® system. The details of these may be requested by interested parties.

• Is there an ECI (environmental cost indicator) score for sulphur concrete pipe?

The LCA/EPD of the THIOTUBE® system also includes an ECI score. It is available on request.

• Are there any inspection wells made of sulphur concrete?

There are no inspection wells made of sulphur concrete yet. Currently, THIOTUBE® pipes are only compatible with IDEAL inspection manholes made of traditional self-compacting concrete. These too are designed with minimal environmental impact. In time, De Bonte Group will offer chemically resistant inspection manholes, which will be a combination of a concrete base element with corrosion protection and sulphur concrete attachments.

• What diameters are available within the THIOTUBE® range?

These can be found on this specific product page (link).



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