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  2. Sanitary manhole - Wikipedia

    en.wikipedia.org/wiki/Sanitary_manhole

    A simple design is a manhole that allows a sanitary worker to open and close a value from the ground level to perform water filling and flushing operations. Water source for flushing manholes can come from potable water, tidal water, or water from clarifiers of sewage treatment plants [1] [29]

  3. Plumbing drawing - Wikipedia

    en.wikipedia.org/wiki/Plumbing_drawing

    A plumbing drawing, a type of technical drawing, shows the system of piping for fresh water going into the building and waste going out, both solid and liquid. It also includes fuel gas drawings. Mainly plumbing drawing consist of water supply system drawings, drainage system drawings, irrigation system drawings, storm water system drawings.

  4. Manhole cover - Wikipedia

    en.wikipedia.org/wiki/Manhole_cover

    A round manhole and its cover. A manhole cover is a removable plate forming the lid over the opening of a manhole, an opening large enough for a person to pass through that is used as an access point for an underground vault or pipe. It is designed to prevent anyone or anything from falling in, and to keep out unauthorized persons and material.

  5. Engineering drawing - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing

    An engineering drawing is a type of technical drawing that is used to convey information about an object. A common use is to specify the geometry necessary for the construction of a component and is called a detail drawing.

  6. Sanitary sewer - Wikipedia

    en.wikipedia.org/wiki/Sanitary_sewer

    A manhole cover for a sanitary sewer access point. View looking down into an open manhole showing two converging sanitary sewer lines. The larger line enters from the right and changes direction within the manhole to exit from the top of the photo. A smaller line enters from the bottom of the photo under the access steps.

  7. Manhole - Wikipedia

    en.wikipedia.org/wiki/Manhole

    PMG manholes in a city street, Perth, Western Australia Manhole being used to access sewer Installation of a fiber-optic manhole in Brooklyn, New York An uncovered manhole in Beirut, Lebanon. A manhole (utility hole, maintenance hole, [1] or sewer hole) is an opening to a confined space such as a shaft, utility vault, or large vessel.

  8. Engineering drawing abbreviations and symbols - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing...

    An order from the engineering department (to be followed by the production department or vendor) overriding/superseding a detail on the drawing, which gets superseded with revised information. Also called by various other names, such as engineering change order (ECO), engineering change notice (ECN), drawing change notice (DCN), and so on.

  9. Mechanical, electrical, and plumbing - Wikipedia

    en.wikipedia.org/wiki/Mechanical,_electrical...

    Competent design of plumbing systems is necessary to prevent conflicts with other trades, and to avoid expensive rework or surplus supplies. The scope of standard residential plumbing usually covers mains pressure potable water, heated water (in conjunction with mechanical and/or electrical engineers), sewerage, stormwater, natural gas, and ...