outflow vs waste pipe

outflow

• Something that flows out of a sewage treatment plant. 

• Any outward movement. 

• The process of flowing out. 

• A fluid that flows out. 

• A stream of gaseous material emanating from an active galactic nucleus. 

• The part of a system that allows material to flow out. 

• To flow outward. 

waste pipe

• a pipe that carries off liquid waste; a drain or drainpipe