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A sanitary sewer or foul sewer is an underground pipe or tunnel system for transporting sewage from houses and commercial buildings (but not stormwater) to treatment facilities or disposal. Sanitary sewers are part of an overall system called a sewage system or sewerage.
Sewage may be treated to control water pollution before discharge to surface waters. Sanitary sewers serving industrial areas also carry industrial wastewater.
Separate sanitary sewer systems are designed to transport sewage alone. In municipalities served by sanitary sewers, separate storm drains may convey surface runoff directly to surface waters. Sanitary sewers are distinguished from combined sewers, which combine sewage with stormwater runoff in one pipe. Sanitary sewer systems are beneficial because they avoid combined sewer overflows.

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  1. J

    NSW blocked shared sewer line, neighbours brick wall collapsing onto my property, front dividing fence broken by tenants

    I am a grandmother and for the past 19 years live in the adjoining semi detached house owned by Toby Greene GWS Giants player in Drummoyne which he purchased in September 2017. In 2018 Toby had 2 female tenants in his property and they blocked the shared sewer line with hygiene products and dog...
  2. Ericad1976

    VIC Combined Sewer Line. How to recover cost

    Hi, I live in Footscray in Victoria. I share a combined sewer pipe with two other neighbours. Recently it was blocked on my side and I’m the last property before it connects to the mains in the street. I’ve received plans to confirm this. The neighbour behind me is a vacant block. There was once...
  3. T

    VIC Shared Sewer tree root damage

    We have a shared sewer with the house next door. We are completely separate properties, each on our own side by side blocks of land. The sewer pipes start in the front far corner of our neighbours block, run back just over 1/2 the depth of the block before cutting across their block, under their...