In the photo below two of the crew port a flushing pump through the jungle. They weren't the easiest things to carry. The coiled tube looped over the pole is the inlet hose. Others, out of the frame, have the fire hose that connected to the flushing tubes.
Interestingly there's no bridging here so either the ground was firm enough that it wasn't needed or they're off the line because of the location the crew has chosen to dig the sump.
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