Trenchless pipe replacement or point repair?

Chapters

Each chapter opens the video at that point on YouTube. Read the script under each chapter. From the subtitle track delivered with the video. Refer to the video and product documentation for technical details.

1. 010:00Trenchless pipe replacement or repair: what decides

   Trenchless pipe replacement is the right answer for some sewers, and the wrong answer for many more. The difference is not the price. It is the record. Every method decision starts with a camera in the pipe. It records the pipe, the defect locations, the connections and the obstructions.

2. 020:19Point repair, lining and pipe bursting: three units of work

   Replacement is a different method, not a bigger repair. Pipe bursting breaks the old pipe and draws a new one through, and it generally needs an excavation. Point repair names the area: one defect. A packer carries a resin patch to that spot, presses it on the wall, and holds it while it cures. Lining names the method: a resin tube cured against the wall, over a defined section. It can treat one defect or a long run, because it describes how, not how much.

3. 030:51What a CCTV record must carry before a method is chosen

   Four things the record has to carry. The pipe and the defect locations, with the connections and the obstructions around them. The distance and the timestamp, which locate a defect but do not measure it. And whether each field was measured, reported by the system, estimated by eye, or unknown. One frame is not the record. A cropped frame can hide a connection, a change in geometry, or the point where the camera stopped seeing.

4. 041:18When a local repair cannot seat

   A rigid sleeve is a ring. It has to touch the wall all the way round. A bore out of round cannot take one: the sleeve stands off the crown and never seats. So the bore is re-rounded first, with a point-repair jack. Under the road, this is what the camera found: a section pressed out of round. No sleeve model fixes that. The shape is restored before a repair is specified. Where the wall is sound and the bore is round, the local repair is a stainless sleeve with an EPDM jacket. It is published from 150 to 2000 millimetres, in two systems.

5. 051:57How to choose between repair and replacement

   So the record chooses the unit of work, not the price. One sound defect: a local repair. Defects spread along a section: line the section. A bore out of shape is re-rounded first, and a pipe that is gone is replaced. Two systems cover it: small up to 600, large up to 2000. Send us the survey and the measured bore, and we will size the repair around it.