Neofit is a rehabilitation system specially developed for the lining of potable water service lines with internal diameters from 0.39” – 1.77”. Although originally developed for the rehabilitation of lead services, the system is equally applicable to services of other materials, like copper or steel. A small flexible pipe made of PET material is brought in the service pipe to be rehabilitated and subsequently expanded. The result is a thin-walled, very strong lining, close-fit inside the old service pipe. In this manner, a protective barrier is created, preventing future contact which could pollute the potable water. Furthermore, the tightness of the old service is restored, and the flow properties increased substantially.