Can plastic pipes be located if a probe cannot be used?
Yes.
For outdoor pipe tracing, we use a signal probe connected to a low-voltage generator. The generator sends a signal through the pipe, and with a detection receiver, we can accurately trace its route and depth underground.
If the use of a probe is not possible, we apply the acoustic detection method with a ground microphone (often referred to as a “thumper”). This allows us to locate the approximate direction of the pipe based on sound vibrations through the soil. However, this method cannot determine depth and is mainly suited for external pipe networks.
Inside buildings, we use a different type of signal probe designed for short-range detection. In these cases, the measurable depth is limited to about 10–15 cm, which is suitable for locating pipes within walls or floor structures.