drain
pipe
Plural
drainpipes
1
a pipe through which liquid is carried away
Synonyms:
2
a pipe installed in a building's plumbing system that carries wastewater or excess water away from the structure
A drainpipe is a pipe that carries away waste water or rainwater from a building or other area. It is typically part of a drainage system and is designed to direct water into a sewer or other drainage area. Drainpipes can be found on the exterior of buildings, leading water from gutters or downspouts away from the foundation. They can also be used underground to move waste water from bathrooms, kitchens, or other facilities to a sewage system. Properly maintained drainpipes help prevent flooding and water damage to structures.