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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. The Weholite pipes constitute an optimal, external solution for the majority of projects connected with gravity sewers. Due to their low weight, they are quick and easy to install. They may be supplied in longer sections than the pipes made of traditional materials. The unique construction and the reliable jointing methods guarantee 100% tightness of the whole system, even after years of operation. The Weholite pipes are flexible and easily adjust to dynamic surroundings. According to Technical Opinion of Central Mining Institute (GIG) they may be applied in mining damage areas (up to level 4). They are resistant to corrosion and to damage done by salt and other chemical compounds that may be found in soil, sea water or in any other transported substances. Weholite pipes and fittings have National Technical Assessments (KOT) issued by the Institute of Building Technology (ITB), Research Institute of Roads and Bridges (IBDiM), and Railway Research Institute (IK). All these attributes make the Weholite pipes a truly universal product of numerous applications. Weholite pipes are available in a broad range of diameters, from 300 to 900 mm, ensuring good adaptability for various projects. The standard pipe lengths are 12.5 m, 6.25 m, 3.125 m, however customized lengths are also available. 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. Uponor Infra offers a wide range of Weholite products, which can be used with any pipe system. Our comprehensive offer comprises segmented bends of any angle, tees, reducers, connectors, and non-standard elements used for a particular project. Our knowledgeable specialists will help you choose the optimal solution. The Weholite system also encompasses access chambers and manholes (with prefabricated bottom or eccentric) and tanks.