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2. Buchan trap - Wikipedia

   en.wikipedia.org/wiki/Buchan_trap

   The Buchan trap was devised in the 19th century to stop the flow of sewer gases due to the miasma theory of disease. [1] For example, it was believed that the disease cholera was an airborne infection, not waterborne. The Buchan trap is normally found in the bottom of manholes or drop-shafts.

3. Gully emptier - Wikipedia

   en.wikipedia.org/wiki/Gully_emptier

   A gully emptier (colloquially: "gully sucker") is a type of specialized tank truck with suction gear which can suck wastewater and mud and sludge out of hollows such as the hollows below drain grids in street gutters and carry it to a suitable disposal point. It needs to be able to suck out and pump through into its tank any road grit and ...

4. 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.

5. Trap (plumbing) - Wikipedia

   en.wikipedia.org/wiki/Trap_(plumbing)

   Water enters at right, fills the trap, and continues left. Inverted siphoning occurs below the line "A". Examples of traps. In plumbing, a trap is a U-shaped portion of pipe designed to trap liquid or gas to prevent unwanted flow; most notably sewer gases from entering buildings while allowing waste materials to pass through. In oil refineries ...

6. Check dam - Wikipedia

   en.wikipedia.org/wiki/Check_dam

   It is typically used in environments where the gully has a moderate slope (less than 10%), small drainage area, and in regions where flood flows do not typically carry large rocks or boulders. [ 17 ] [ 15 ] In nearly all instances, erosion control blankets, which are biodegradable open-weave blankets, are used in conjunction with check dams.

7. Dust collector - Wikipedia

   en.wikipedia.org/wiki/Dust_collector

   A baghouse is an air pollution abatement device used to trap particulate by filtering gas streams through large fabric bags. They are typically made of glass fibers or fabric. [citation needed] A cyclone separator is an apparatus for the separation, by centrifugal means, of fine particles suspended in air or gas. [citation needed]

8. 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 ...

9. Forebay (reservoir) - Wikipedia

   en.wikipedia.org/wiki/Forebay_(reservoir)

   They may be used upstream of reservoirs to trap sediment and debris (sometimes called a sediment forebay [2]) in order to keep the reservoir clean. This entails the use of a dam built upstream of the main reservoir, called a forebay dam or pre-dam. Forebays may also be used upstream of lakes to prevent siltation. Some forebays are used simply ...