Multi-purpose polyethylene tanks for water, sewage and other liquids

Weholite polyethylene tanks are distinguished by high quality, versatility and a wide range of capacities. Uponor Infra's offer includes tanks with internal diameters ranging from 1000mm to 3000mm and any capacity tailored to the individual needs of the customer. Weholite tanks are intended for the storage, storage or retention of:

  • sanitary, municipal and storm sewage
  • drinking water
  • storm, technological and fire water etc.
  • liquids produced by agri-food industry
  • aggressive industrial sewage
  • liquids used in biogas plants
  • other liquids (containing chemical compounds to which PE-HD is chemically resistant)


Product Catalogue
Uponor tanks

Advantages of tanks


  • Double walls and welded joints guarantee 100% leak-free operation and long-term durability
  • Non-toxic
  • Foundation in difficult soil and water conditions possible
  • Installation in roads and underneath car parks
  • Total resistance to corrosion and high resistance to chemicals
  • Long storage with no loss of parameters (UV resistant)
  • Low weight, quick and easy assembly (also in winter conditions)

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.

Dimensions and capacity of the tanks

Single-body tanks

Single-body tanks

A typical Uponor tank is a single-body structure, but there is a possibility to join tanks into batteries of any capacity. Prefabricated tanks delivered as one component may be of capacity ranging from 2 to 90 m3 (larger capacities are manufactured on demand and transported on individual conditions). The maximum length of the delivered tanks is only restricted by transport limitations.
zbiorniki Jednoelementowe Uponor Infra
Large capacity tanks

Large capacity tanks

Large capacity tanks (up to even over a dozen thousand cubic meters) are delivered in sections that are ready to be joined by extrusion welding. Consequently, the final product is a monolithic construction that is free of mechanical joints and guarantees maximum water tightness and reliability. Such a solution enables the installation of large capacity tanks with the optimum use of the available terrain.
Multi komponent tanke

More information on tanks


Uponor Infra retention systems

Brochure ENG version

PDF 2.65MB

Product catalogue 2019

Product catalogue PL, ENG, RUS version

PDF 11.99MB

Uponor Infra - Reference projects

Brochure ENG version

PDF 4.51MB