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In fact, it's so strong, it has the potential to do permanent damage
to the aging sewer line
to the aging sewer line
Full Transcript
00:00:01.000 --> 00:00:02.048
In fact, it's so strong,
00:00:02.518 --> 00:00:04.268
it has the potential to do
00:00:04.311 --> 00:00:07.171
permanent damage
to the aging sewer line.
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Movie Summary
An up-close look at the heroes that keep America's sewer systems running.