Acoustic Blockage Detection (SL-RAT)
The Sewer Line Rapid Assessment Tool (SL-RAT) is a portable assessment device that utilizes sound to quickly assess pipes and identify potential blockages in gravity sewer systems. This non-invasive acoustic technology helps determine where blockages exist without the need for costly, time-consuming visual inspections.
How it Works

The SL-RAT consists of two calibrated components: an acoustic Transmitter (TX) and a Receiver (RX). The TX is placed at one end of the pipe and sends sound to the RX at the other end. The RX analyses the sound it receives to determine whether any blockages exist in the pipe. The entire process takes less than three minutes per pipe, providing real-time insights into the pipe’s condition.

Data That Drives Informed Decisions

SL-RAT inspection data allows for focused cleaning efforts and pre-maintenance inspections that reduce costs going into a project. This tool also proves useful for quality assurance checks after cleaning or for a quick blockage assessment.


SL-RAT inspection data helps streamline maintenance by allowing crews to focus cleaning efforts where they are needed most, reducing overall project costs. It also serves as an effective quality assurance tool after cleaning, ensuring that sewer lines are free of obstructions, or as a quick pre-maintenance check to assess any blockages.

frequently asked questions

What are the benefits of SL-RAT?

  • Rapid Results: Get accurate blockage information in under three minutes
  • Cost-Effective: Reduce inspection costs by targeting cleaning only where it’s needed
  • Versatile: Useful for both initial assessments and post-cleaning quality checks

What types of pipe can be inspected with SL-RAT?


SL-RAT inspections can be performed on 6-12” gravity lines.

More questions?

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