Sewer

Sewers are underground pipes that take away dirty water and human waste from homes, offices and many other places. Sanitary sewers lead to sewage treatment plants that remove the harmful and unwanted parts, returning clean water to the environment. Many rules and regulations exist for how clean the final discharge (effluent) must be. Storm sewers are usually simpler. Houses that do not have a connection to city sewer will have a septic tank.

Cleaning crews use special trucks and tools to help keep the sewers clear of grease, tree roots, and other blockages. More rural areas may have septic systems where sewers do not yet exist. In many urban areas, street gutters to carry rainwater are combined with sewers.

Template:Plumbing

This short article can be made longer. You can help Wikipedia by adding to it.

v t e Sewerage
Types	Combined sewer Decentralized wastewater system Drain-waste-vent system Effluent sewer Force main Gravity sewer Outfall Pressure sewer Sanitary sewer Simplified sewerage Storm drain Vacuum sewer
Construction materials	Asbestos cement pipe Brickwork Cast iron pipe Concrete pipe Culvert Interceptor ditch Plastic pipe Reinforced concrete Steel pipe Vitrified clay pipe
Related equipment	Chopper pumps Combined sewer overflow Grease trap Grinder pump Maceration Lift station Sanitary manhole Sewage pumping Sewer dosing unit Sewer gas destructor lamp Stormwater detention vault Submersible pump Sump pump Trap
Problems	Biogenic sulfide corrosion Blocked Sewer Fatberg First flush Infiltration/Inflow Sanitary sewer overflow Sewer fly Sewer gas Sewer rat
Liquids transported	Blackwater (waste) Greywater Industrial wastewater Sewage Stormwater
Background	History of water supply and sanitation