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  2. Stain removal - Wikipedia

    en.wikipedia.org/wiki/Stain_removal

    Another factor in stain removal is the fact that stains can sometimes comprise two separate staining agents, which require separate forms of removal. A machine oil stain could also contain traces of metal, for example. [1] Also of concern is the color of the material that is stained.

  3. French drain - Wikipedia

    en.wikipedia.org/wiki/French_drain

    A diagram of a traditional French drain. A French drain [1] (also known by other names including trench drain, blind drain, [1] rubble drain, [1] and rock drain [1]) is a trench filled with gravel or rock, or both, with or without a perforated pipe that redirects surface water and groundwater away from an area.

  4. Creep and shrinkage of concrete - Wikipedia

    en.wikipedia.org/.../Creep_and_shrinkage_of_concrete

    Creep and shrinkage of concrete are two physical properties of concrete. The creep of concrete, which originates from the calcium silicate hydrates (C-S-H) in the hardened Portland cement paste (which is the binder of mineral aggregates), is fundamentally different from the creep of metals and polymers.

  5. 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.

  6. CCTV drain camera (plumbing) - Wikipedia

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

    CCTV drain cameras, also known as sewer cameras or pipe inspection cameras, are a line of waterproof, high definition cameras that have become a widely popular technology in the plumbing profession. These cameras are advanced diagnostic tools that allow plumbers to execute plumbing inspections, called CCTV Drain Surveys [ 1 ] with heightened ...

  7. Pipeline video inspection - Wikipedia

    en.wikipedia.org/wiki/Pipeline_video_inspection

    Pipeline video inspection is a form of telepresence used to visually inspect the interiors of pipelines, plumbing systems, and storm drains.A common application is for a plumber to determine the condition of small diameter sewer lines and household connection drain pipes.

  8. Decorative concrete - Wikipedia

    en.wikipedia.org/wiki/Decorative_concrete

    Stamped concrete in various patterns, highlighted with acid stain. Decorative concrete is the use of concrete as not simply a utilitarian medium for construction but as an aesthetic enhancement to a structure, while still serving its function as an integral part of the building itself such as floors, walls, driveways, and patios.

  9. Cleaning - Wikipedia

    en.wikipedia.org/wiki/Cleaning

    Cleaning is the process of removing unwanted substances, such as dirt, infectious agents, and other impurities, from an object or environment. Cleaning is often performed for aesthetic , hygienic , functional , safety , or environmental protection purposes.