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  2. 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.

  3. Tile drainage - Wikipedia

    en.wikipedia.org/wiki/Tile_drainage

    Soil type greatly affects the efficacy of tile systems, and dictates the extent to which the area must be tiled to ensure sufficient drainage. Sandier soils will need little, if any, additional drainage, whereas soils with high clay contents will hold their water tighter, requiring tile lines to be placed closer together.

  4. Drainage - Wikipedia

    en.wikipedia.org/wiki/Drainage

    High-density polyethylene pipe installation in a storm drain project, Mexico. Drainage is the natural or artificial removal of a surface's water and sub-surface water from an area with excess water. The internal drainage of most agricultural soils can prevent severe waterlogging (anaerobic conditions that harm root growth), but many soils need ...

  5. Culvert - Wikipedia

    en.wikipedia.org/wiki/Culvert

    As the diameter of the reline pipe will be smaller than the host pipe, the cross-sectional flow area will be smaller. By selecting a reline pipe with a very smooth internal surface with an approximate Hazen-Williams Friction Factor C value of between 140–150, the decreased flow area can be offset, and hydraulic flow rates potentially ...

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  8. Soil map - Wikipedia

    en.wikipedia.org/wiki/Soil_map

    A soil map is a geographical representation showing diversity of soil types or soil properties (soil pH, textures, organic matter, depths of horizons etc.) in the area of interest. [1] It is typically the result of a soil survey inventory, i.e. soil survey .

  9. Orangeburg pipe - Wikipedia

    en.wikipedia.org/wiki/Orangeburg_pipe

    The first known use of any fiber pipe was in an experimental water delivery line in the Boston, Massachusetts, area. The pipeline, finished in 1867, measured 1.5 miles in length and was in use through 1927. Bituminized pipe was not in widespread commercial use until the late 19th century when it was used exclusively as electrical conduit. [1]

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