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  2. Coupling (piping) - Wikipedia

    en.wikipedia.org/wiki/Coupling_(piping)

    Alternatively it is a short length of pipe with two female National pipe threads (NPT) (in North American terms, a coupler is a double female while a nipple is double male) or two male or female British standard pipe threads. If the two ends of a coupling are of different standards or joining methods, the coupling is called an adapter. Examples ...

  3. Piping and plumbing fitting - Wikipedia

    en.wikipedia.org/wiki/Piping_and_plumbing_fitting

    The groove is made by cold-forming (or machining) a groove at the end of a pipe. A gasket encompassed by coupling housing is wrapped around the two pipe ends, with the coupling engaging the groove; the bolts and nuts are tightened with a socket or impact wrench. The installed coupling housing encases the gasket and engages the grooves around ...

  4. Plumbing - Wikipedia

    en.wikipedia.org/wiki/Plumbing

    Galvanized steel potable water supply and distribution pipes are commonly found with nominal pipe sizes from 38 inch (9.5 mm) to 2 inches (51 mm). It is rarely used today for new construction residential plumbing.

  5. Hirth joint - Wikipedia

    en.wikipedia.org/wiki/Hirth_joint

    Hirth joint made from anodized aluminum to show the meshing of the teeth Hirth joint (disassembled) between the semi-axles of a Campagnolo Ultra-Torque crankset. Face spline joints consist of a ring of radial splines or teeth milled or ground into the end faces of two rotary components such as a drive shaft and the hub of a wheel.

  6. Nipple (plumbing) - Wikipedia

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

    A close nipple can only be unscrewed by gripping one threaded end with a pipe wrench which will damage the threads and necessitate replacing the nipple, or by using a specialty tool known as a nipple wrench (or known as an internal pipe wrench) which grips the inside of the pipe, leaving the threads undamaged. When the ends are of two different ...

  7. Home wiring - Wikipedia

    en.wikipedia.org/wiki/Home_wiring

    Note the connection of the security system to the phone line requires a wiring configuration that allows the security system to disconnect all phones in the home when it needs to connect to the monitoring center. This is critical, if the wiring is not correct the system may not communicate back to base when an intrusion is detected.

  8. Circuit diagram - Wikipedia

    en.wikipedia.org/wiki/Circuit_diagram

    A circuit diagram (or: wiring diagram, electrical diagram, elementary diagram, electronic schematic) is a graphical representation of an electrical circuit. A pictorial circuit diagram uses simple images of components, while a schematic diagram shows the components and interconnections of the circuit using standardized symbolic representations.

  9. Compression fitting - Wikipedia

    en.wikipedia.org/wiki/Compression_fitting

    A compression fitting 15 mm isolating valve. A compression fitting is a fitting used in plumbing and electrical conduit systems to join two tubes or thin-walled pipes together. . In instances where two pipes made of dissimilar materials are to be joined (most commonly PVC and copper), the fittings will be made of one or more compatible materials appropriate for the connect