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Related to pipe away: pipe down
To remove some gas or liquid (from something or some place) using one or more pipes. A noun or pronoun can be used between "pipe" and "away." We'll need to pipe away the toxic gas before we can activate the reactor. Piping groundwater away from the construction site should be our first priority.
pipe something away
to conduct a liquid or a gas away through a pipe. We will have to pipe the excess water away. They piped away the water.