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  2. Saddle valve - Wikipedia

    en.wikipedia.org/wiki/Saddle_valve

    A saddle valve is mounted directly on to a pipe which is usually 1/2 inch copper tubing. Saddle valves are self-tapping devices. Once mounted on a line, with the included rubber seal in place, all that is required is to turn the valve clockwise until it pierces the water line. When the valve handle can no longer be turned, it is done tapping ...

  3. Hot tapping - Wikipedia

    en.wikipedia.org/wiki/Hot_tapping

    Hot taps can range from a ½ inch hole designed for something as simple as quality control testing, up to a 48-inch tap for the installation of a variety of ports, valves, t-sections or other pipes. Hot Tap Procedures: A. A hot tap saddle, service saddle or welded threadolet, valve installed, assembly is pressure tested and hot tap machine ...

  4. Piping and plumbing fitting - Wikipedia

    en.wikipedia.org/wiki/Piping_and_plumbing_fitting

    Piping or tubing is usually inserted into fittings to make connections. Connectors are assigned a gender, abbreviated M or F. An example of this is a "3 ⁄ 4-inch female adapter NPT", which would have a corresponding male connection of the same size and thread standard (in this case also NPT).

  5. List of valves - Wikipedia

    en.wikipedia.org/wiki/List_of_valves

    Saddle valve: where allowed, is used to tap a pipe for a low-flow need; Schrader valve: holds the air inside automobile tires; Security valve, a type of automatic shut-off valve (ASV): used to stop the flow of natural gas upon sudden pressure changes. Increased pressure or decreased pressure closes the valve (without using any external power ...

  6. 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

  7. U2’s Larry Mullen Jr. Reveals Dyscalculia Diagnosis, Which He ...

    www.aol.com/u2-larry-mullen-jr-reveals-130614878...

    Larry Mullen Jr. has always found it difficult to comprehend arithmetic, and now he knows why.. After years of struggling with numeracy skills such as adding and counting, the U2 drummer, 63, has ...

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