rough in
n.— «Plumbers use what’s called a “rough in” sheet that comes with exposed sinks to place the water and drain lines inside the wall exactly where they need to stick out under the fixture.» —“Single to double could spell trouble” by Ed Del Grande Evansville Courier & Press (Indiana) Aug. 29, 2007. (source: Double-Tongued Dictionary)
Further reading
Professional dog walkers call a dog obsessed with carrying sticks a branch manager. Another dog who grabs the other end of the stick and helps carry it around is jokingly called an assistant branch manager. This is part of a complete episode.
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