Yes. For a **100 mm PVC waste pipe**, two types of equipment are useful:

- **A drain camera or probe with a sonde:** A sonde is a small transmitter pushed into the pipe through an accessible opening, such as a cleanout. A handheld receiver locates it through the wall. Moving the probe and marking successive positions lets you trace the pipe’s route. Ask a drain specialist for a “camera inspection with sonde locating.” [RIDGID’s locating equipment](https://www.ridgid.com/us/en/navitrack-scout-locator) supports this method.
- **A radar wall scanner rated for empty plastic pipes:** Some scanners can detect these, depending on the wall construction and pipe depth. Check the specifications carefully: a scanner advertised for *water-filled plastic pipes* may be unsuitable for a waste pipe, which normally contains air. [Bosch lists both capabilities for certain detectors](https://www.bosch-professional.com/gb/en/detectors-101302-ocs-c/).

An ordinary metal detector will not detect PVC itself. A basic stud finder might register a change behind plasterboard, but that reading cannot reliably identify it as a pipe.

For your drain, **I would start with sonde locating if there is access into the pipe**. If access is unavailable, consider a suitable radar scanner or inspect the wall cavity with a borescope through a carefully chosen opening. The wall material and depth matter as much as the pipe’s diameter.

Before drilling or cutting, confirm the position and check for nearby electrical cables; a detector reading alone does not establish that a spot is safe to drill.