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  2. 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 ...

  3. 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.

  4. Pressure sewer - Wikipedia

    en.wikipedia.org/wiki/Pressure_sewer

    The discharge pipe may be as small as 50 mm diameter carrying sewage at very high flow rates. [2] Pressure sewers are also used to collect the discharge from septic tanks and discharge this into the local gravity sewer to protect local ground water from contamination. [3]

  5. Hazen–Williams equation - Wikipedia

    en.wikipedia.org/wiki/Hazen–Williams_equation

    The Hazen–Williams equation is an empirical relationship that relates the flow of water in a pipe with the physical properties of the pipe and the pressure drop caused by friction. It is used in the design of water pipe systems [ 1 ] such as fire sprinkler systems , [ 2 ] water supply networks , and irrigation systems.

  6. Sewerage - Wikipedia

    en.wikipedia.org/wiki/Sewerage

    Depending on the concrete condition and contamination, the cleaning can range from simple high pressure jet water cleaning (200 bar) up to real hydro-demolition (2000 bars). One method to ensure sound concrete is exposed is to verify that the surface pH is superior to 10. As for any concrete repair, the state-of-the-art rules must be followed.

  7. Manning formula - Wikipedia

    en.wikipedia.org/wiki/Manning_formula

    Most friction coefficients (except perhaps the Darcy–Weisbach friction factor) are estimated 100% empirically and they apply only to fully rough turbulent water flows under steady flow conditions. One of the most important applications of the Manning equation is its use in sewer design. Sewers are often constructed as circular pipes.

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  9. Hydraulically activated pipeline pigging - Wikipedia

    en.wikipedia.org/wiki/Hydraulically_Activated...

    Hydraulically activated pipeline pigging (HAPP) is a pigging technology applied for pipeline cleaning. The basic principle is that a pressure drop is created over a by-passable pig held back against a pipeline's fluid flow. The pipeline fluid passing through the pig's cleaning head is accelerated by this pressure drop, forming strong cleaning jets.

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