The RAT Pack - Using sound to find clogged sewer pipes

Lee Liller from the city of Rockville introduces the SL-RAT, a device used to assess sewer main blockages using sound waves. The video demonstrates the operation of the SL-RAT, explaining how it provides readings from 0 to 10 to indicate the level of blockage. A reading of 6 to 10 suggests a clear pipe, while 0 to 5 indicates a blockage. The SL-RAT is more efficient than previous methods, allowing coverage of 6,000 feet compared to 1,500 feet with a camera truck. The video concludes with appreciation for the audience's attention.

What was the reading obtained during the demonstration, and what did it signify?

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How does the efficiency of the SL-RAT compare to the previous camera truck method?

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