Weholite pipe on truck Uponor Infra factory

Weholite pipes

Weholite* - a modern system designed for the construction of external sewage systems


Weholite is a modern system of large-diameter, structural polyethylene (PE) pipes and fittings, designed for the construction of complete external sewer pipelines. The system is a result of the long-lasting research and development works carried out by our corporation. The combination of an appropriate raw material and an advanced technology enabled us to create a product of a high load resistance.

Weholite pipes are available in a broad range of diameters, from 300 to 3000 mm, ensuring good adaptability for various projects. The standard pipe length is 12.5 m. Weholite pipes (socket or plain- ended) are manufactured with ring stiffness classes from SN2 to SN16 (kN/m2) for applications in various ground conditions. There is a possibility to order special, non-standard pipes of any length and ring stiffness.Our comprehensive offer comprises segmented bends of any angle, tees, reducers, connectors, and non-standard elements used for a particular project. The Weholite system also encompasses access chambers and manholes (with prefabricated bottom or eccentric) and tanks.

* DN 300÷900 - Weholite 
  DN 1000÷3000 - Weholite PLUS

Product Catalogue
Weholite pipes

Advantages of Weholite


  • Unique combination of durability and flexibility
  • Ultimate corrosion resistance and broad chemical resistance
  • Low weight (easy transport and unloading)
  • Suitability for overground systems/networks (resistance to UV)
  • Easy installation regardless of weather conditions (also in sub-zero temperatures)
  • High abrasion resistance
  • Suitability for extrusion welding, which guarantees 100% leak tightness in a broad range of operating conditions
  • Complete protection against root penetration
  • Possibility to apply in mining damage areas (up to level 4).


Jointing methods

Extrusion welding

Extrusion welding

Extrusion welding is one of the most frequently used methods of joining Weholite pipes. It can be performed with a manual extruder for pipes with a whole range of diameters (one-sided or two-sided welding), including relining renovations. The welded joint is inseparable and guarantees the possibility of transferring axial longitudinal forces.

Extrusion welding
Welding with WLI-3000 machine

Welding with WLI-3000 machine

Extrusion welding can be carried out automatically with the WLI-3000 machine. It is a technology for connecting large-diameter Weholite pipes with diameters from 1400 mm from the inside.

extrusion welding with WLL-3000 machine
Socket joint

Socket joint

Socket connection (socket with a gasket or double socket with two gaskets) is used for laying pipelines in the diameter range from 300 to 1000 mm. At least double-lip seals are made of EPDM (as well as SBR or NBR).
socket joint
Thread joint

Thread joint

Thread joint is used in the renovation of damaged canals and for the construction of culverts. The connection is sand-proof. Water-tightness is achieved by making an external extrusion weld. The thread joint is available in diameters up to 1000 mm, larger diameters is available on request.

Weholite thread joint method
Weholite snap joint

Weholite snap joint

Weholite snap joint is a mechanical, inseparable connection of Weholite pipes, which does not increase the outer diameter of the pipeline in the places of connections. It is most often used in the renovation of pipelines and in the case of laying pipes in unstable soil and water conditions. Available in diameters from 600 to 1200 mm.



Uponor Weholite PLUS

Weholite PLUS

As a company that constantly develops and cares for the environment, we introduce a new generation of Weholite pipes under the name Weholite PLUS, which are adapted to the current EU directives related to the use of plastics in the circular economy. Thanks to the combination of a new type of PE raw material with advanced technology, we have obtained a product with very good mechanical and functional properties.

Weholite PLUS has already received all legally required approvals for use on the construction market. The first stage of system implementation covered diameters from 1000 to 3000 mm, the next stage covers the remaining diameter range.

Exceptional flexibility of Weholite

Flexibility is the distinctive feature of PE pipes among other conventional materials. Thanks to it, they perfectly cooperate with the ground, as if they were its natural element. Weholite pipe is flexible and does not crack under the influence of soil pressure, even with 30% deflection.

Automatic welding of Weholite pipes with the WLI-3000 machine

Automatic welding with the WLI-3000 machine is the latest technology of connecting Weholite large-diameter pipes from the inside. The joint obtained in this way is homogeneous in material, durable, and guarantees 100% tightness throughout the entire period of operation.

More information on Weholite


Uponor Infra - piping systems

Brochure ENG version

PDF 1.42MB

Product catalogue 2019

Product catalogue PL, ENG, RUS version

PDF 11.99MB

Uponor Infra - Gravity systems

Manual ENG version

PDF 35.48MB

Uponor Infra - WLI 3000 Extrusion welding machine

Brochure ENG version

PDF 3.20MB