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2. Storm drain - Wikipedia

   en.wikipedia.org/wiki/Storm_drain

   Storm drain grate on a street in Warsaw, Poland Storm drain with its pipe visible beneath it due to construction work. A storm drain, storm sewer (United Kingdom, U.S. and Canada), highway drain, [1] surface water drain/sewer (United Kingdom), or stormwater drain (Australia and New Zealand) is infrastructure designed to drain excess rain and ground water from impervious surfaces such as paved ...

3. Sanitary sewer - Wikipedia

   en.wikipedia.org/wiki/Sanitary_sewer

   To overcome these disadvantages, some cities built separate sanitary sewers to collect only municipal wastewater and exclude stormwater runoff, which is collected in separate storm drains. The decision to build a combined sewer system or two separate systems is mainly based on the need for sewage treatment and the cost of providing treatment ...

4. Sewerage - Wikipedia

   en.wikipedia.org/wiki/Sewerage

   Map of London sewer network, late 19th century. Sewerage (or sewage system) is the infrastructure that conveys sewage or surface runoff (stormwater, meltwater, rainwater) using sewers. It encompasses components such as receiving drains, manholes, pumping stations, storm overflows, and screening chambers of the combined sewer or sanitary sewer.

5. Effluent sewer - Wikipedia

   en.wikipedia.org/wiki/Effluent_sewer

   There are two main types of gravity sewers, sanitary and combined. Sanitary sewers only treat the wastewater from homes and business. Combined sewers have storm drains that are connected to the sewerage. In areas with high rainfall, this results in an enormous additional amount of wastewater that has to be treated. Combined sewers have higher ...

6. Combined sewer - Wikipedia

   en.wikipedia.org/wiki/Combined_sewer

   Combined sewer outflow into the Anacostia River in Washington, D.C. Ratcliff Beach CSO discharges into the River Thames in London [7]. These relief structures, called "storm-water regulators" (in American English - or "combined sewer overflows" in British English) are constructed in combined sewer systems to divert flows in excess of the peak design flow of the sewage treatment plant. [6]

7. Drain-waste-vent system - Wikipedia

   en.wikipedia.org/wiki/Drain-waste-vent_system

   A sewer pipe is normally at neutral air pressure compared to the surrounding atmosphere.When a column of waste water flows through a pipe, it compresses air ahead of it in the system, creating a positive pressure that must be released so it does not push back on the waste stream and downstream traps, slow drainage, and induce potential clogs.