This is a method of replacing existing defective metallic, plastic, clay or cement pipes with new PE Pipe, usually with the same or a larger diameter pipe.
Advantages are that there is minimal surface disruption and the replacement follows the line of the existing pipe.
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 36 inch  diameter and greater have been replaced