Sewer replacement and repair
The following video shows a sample of pipe bursting a 36 inch pipe by Lopez utilities
This pipe bursting method is the ideal pipe replacement technique for various pipe types including clay, steel, asbestos cement, concrete and pitch fibre, installing diameters from 75mm up to 300mm and in lengths up to 100m the new MDPE or HDPE can be installed in short sections or one continuous length.
Pipebursting may also be used to expand pipeline carrying capacity by replacing smaller pipes with larger ones, or “upsizing.” Extensive proving work by the gas and water industries has demonstrated the feasibility of upsizing gas mains, water mains and sewers. Upsizing from 100mm to 225mm diameter is now well established, and pipes of up to 900mm  diameter and greater have been replaced.
Directional drilling, commonly called horizontal directional drilling or HDD, is a steerable trenchless method of installing underground pipes, conduits and cables in a shallow arc along a prescribed bore path by using a surface-launched drilling rig, with minimal impact on the surrounding area. Directional boring is used when trenching or excavating is not practical. It is suitable for a variety of soil conditions and jobs including road, landscape and river crossings. Installation lengths up to 2000 m have been completed, and diameters up to 1200 mm have been installed in shorter runs. Pipes can be made of materials such as PVC, polyethylene, polypropylene, Ductile iron, and steel if the pipes can be pulled through the drilled hole. Directional boring is not practical if there are voids in the rock or incomplete layers of rock. The best material is solid rock or sedimentary material. Soils with cobble stone are not recommended. There are different types of heads used in the pilot-hole process, and they depend on the geological material.