Wiktionary
n. conduit for the removal of water or waste water.
Usage examples of "drainage pipe".
About thirty feet beneath the main tunnel was a drainage pipe, large enough for her to move through if she stooped over.
She continued her reconnaissance, flitting silently with the grace of a cat through the underbrush until she came to a small drainage pipe two feet in diameter that ran under the fence before emptying in a ditch parallel to the old mill.
Between two split slabs of concrete an opening could be seen, more of the old basement, or maybe a drainage pipe.
Then he crawled from the drainage pipe, warily surveyed the area, and began doing stretching exercises to relieve his stiff muscles.
Looking up, Tristan saw that they stood below some kind of drainage pipe.
She was curled up inside a big one-meter drainage pipe that ran under the road.
Up until fifteen years ago, a large drainage pipe ran under the water-front section of Brooklyn and emptied into the Fast River.