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Flexible solutions for generations to come

The human right to housing is more than 4 walls and a roof. It is also the right of protection from cold and heat, now and in the future. Heating, cooling, domestic and potable water should be available anytime, anywhere. At the heart of that protection lies an efficient underground distribution system. But how can we secure a reliable and efficient supply to maximize our use of energy at minimal financial, environmental and infrastructural cost?

Safety first – for people, and environment!

Installing new pipelines in congested ground conditions can be a difficult challenge for designers and installers. There is a lot of pressure to do this quickly, yet effectively, with minimal disruptions to surroundings and building structures. Regulations also increasingly require these installations to be durable.

The good news is; we can help! Together with leading energy and water suppliers we have developed flexible maintenance-free solutions that are safe and sustainable, yet fast to implement, ensuring an efficient supply for generations to come. We tailor our solutions to all needs and conditions; space restrictions and difficult ground conditions are our bread and butter!

We co-operate with traditional owners as well as new investors to implement fast, reliable and sustainable network solutions for all types of projects with minimal disturbance and optimal benefits for our stakeholders.

Sustainability is key

That's our ambition. A durable design to secure valuable living for now and generations to come is the reason why. We hold ourselves responsible for the future and strive for a circular economy - our systems are perfectly attuned to those values.

We know how

We have over 30 years of experience implementing our systems in all types of conditions, each with its own challenges. As we keep close to our stakeholders, it gives us the opportunity to understand the real challenges that need to be solved.

Take a hotel resort that wants to ensure the best satisfaction for their guests. That requires an infrastructure that works safely under all different load conditions, for both heating and cooling. A hospital has to provide the highest health standards in their systems - at all times. A city needs reliable  heating in harsh winters to keep its citizens alive.

We are faced with these crucial challenges everywhere around the world. 

Ask our specialists how we can answer to your needs. With our full support in every step of the way, from engineering to the final pressure tests, we make sure you realize your goals.

Underground Solutions for Heating & Cooling, Hot & Cold potable water

Thermaflex FLEXALEN
Flexible, pre-insulated piping system, with PB-1 medium pipes, Polyolefin insulation and Polyethylene outer casing – completely recyclable.

Temperature range: -10°C to +95°C
Pressure ranges:

  • 8 - 16 bar (depending on operating temperature) until d110
  • 5 - 10 bar (depending on operating temperature) until d225

Dimension range: d16 – d225 (DN12 – DN200)
Pipe length: up to 300m for coiled material (d16 – d125)
6 or 12 m for semi flexible sticks (d50 – d225)
Certification: KIWA, CSTB, DVGW, GHOST
Standard reference: EN 15632, CSTB, DVGW, BRL, GHOST

Fittings: PB-1 fittings for electro fusion, socket- and butt fusion
Transition fittings: Available to connect to all standard types of materials, valves and other components
Prefabrications: Tailor made prefabrications for branches, elbows etc


  KIWA certificate K8492801 welding process for plastic piping systems Flexalen 600 PDF 371 KB Preview Download Mail

This process certificate is issued by KIWA on the basis of BRL 5609 'pre-insulated flexible plastics piping systems for warm water distribution outside buildings'

Together with KIWA the welding process of electrofusion, polyfusion and butt welding is technical approved with product certificate stated requirements.

  Earth Quake resistance certificate PDF 735 KB Preview Download Mail

Technical report of dynamic tests performed on Flexalen pre-insulated pipe systems, simulating seismic with 7-9 intensity on the MSK-64 scale.
Flexalen is recommended for applications in the regions with seismic activity of 7-9 magnitude.


Radius 10 Km
200 Km
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