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[narrator] The solenoid is an
electromagnetically-controlled device that tightens
or loosens the pump
station's valves, which control
the amount of water flowing into
and out of the facility
electromagnetically-controlled device that tightens
or loosens the pump
station's valves, which control
the amount of water flowing into
and out of the facility
Full Transcript
00:00:01.000 --> 00:00:03.069
[narrator] The solenoid is an
electromagnetically-controlled
00:00:03.724 --> 00:00:07.444
device that tightens
or loosens the pump
station's valves,
00:00:07.482 --> 00:00:08.752
which control
the amount of water
00:00:08.793 --> 00:00:11.963
flowing into
and out of the facility.
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Movie Summary
An up-close look at the heroes that keep America's sewer systems running.