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  2. Piping and plumbing fitting - Wikipedia

    en.wikipedia.org/wiki/Piping_and_plumbing_fitting

    An example of this is a "34-inch female ... 3-PC HFF Ball Valve Flange Coupling Cap ... Cast iron DWV pipe and fittings are still used in premium construction ...

  3. Hose coupling - Wikipedia

    en.wikipedia.org/wiki/Hose_coupling

    Coupling for hose and pipe. US 894900 A [2 ... one being rare and mainly used on + 34-inch hoses. ... and DIN standards 14310, 14311, 14312, and 14313 (caps). ...

  4. North American Fire Hose Coupler Incompatibilities - Wikipedia

    en.wikipedia.org/wiki/North_American_Fire_Hose...

    At its annual convention at Dallas, TX, the NFPA formally adopted a standard with 2 + 1 ⁄ 2-inch hose with 7.5 threads per inch as the primary standard, with additional sizes of 3 and 3.5 inches (each with 6 threads per inch) and a 4.5 inch coupling with 4 threads per inch, with the fire hydrant standard specifying one 4.5 inch port and two 2 ...

  5. Storz - Wikipedia

    en.wikipedia.org/wiki/Storz

    The 100 mm (4-inch) and 125 mm (5-inch) Storz couplers have been specified in NFPA 1963, Standard for Fire Hose Connections, since the 1993 edition. U.S. cities that have fire hydrants with 125 mm Storz connectors include Raleigh, NC [ 5 ] and the City of Corvallis, OR (adapter on 4-inch threaded outlet).

  6. 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 ...

  7. Copper tubing - Wikipedia

    en.wikipedia.org/wiki/Copper_tubing

    For example, DN20 is the size for copper pipe with an outside diameter of 19.05 mm or 34 inch. While pipe sizes in Australia are inch-based, they are classified by outside rather than inside diameter (e.g., a nominal 34 inch copper pipe in Australia has measured diameters of 0.750 inches outside and 0.638 inches inside, whereas a ...

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