Sanitary sewer
(重定向自Foul sewer)


![Schematic of a conventional sanitary sewer to convey blackwater and greywater from households to a centralized sewage treatment facility[5]](/uploads/202501/14/Schematic_of_the_Conventional_Gravity_Sewer4033.jpg)

A sanitary sewer or "foul sewer" is an underground carriage system specifically for transporting sewage from houses and commercial buildings through pipes to treatment or disposal. Sanitary sewers are part of an overall system called sewerage or sewage system.