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2. Atmospheric vacuum breaker - Wikipedia

   en.wikipedia.org/wiki/Atmospheric_vacuum_breaker

   It is usually constructed of brass and resembles a 90-degree elbow with a hood on its top to allow air to enter the water system if a siphon attempts to form. Inside this elbow is a poppet valve that is held "up" by the water pressure found in the system, closing the air entrance to the device. If the pressure in the "upstream side" is reduced ...

3. Piping and plumbing fitting - Wikipedia

   en.wikipedia.org/wiki/Piping_and_plumbing_fitting

   Fittings allow multiple pipes to be connected to cover longer distances, increase or decrease the size of the pipe or tube, or extend a network by branching, and make possible more complex systems than could be achieved with only individual pipes. Valves are specialized fittings that permit regulating the flow of fluid within a plumbing system.

4. Hose barb - Wikipedia

   en.wikipedia.org/wiki/Hose_barb

   Hose barb fittings are small curved, bent or T-shaped pipes, hoses or tubes with hose barbs on at least one side used to join two or more pieces of piping (hosing, tubing) together. [1] Hose barbs are commonly used in the agriculture industry to connect anhydrous ammonia (NH 3) hoses. [2]

5. Nipple (plumbing) - Wikipedia

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

   ASTM B687-99(2005)e1 Standard Specification for Brass, Copper, and Chromium-Plated Pipe Nipples. ASME B1.20.7 Hose Coupling Screw Threads, Inch. (Quote: The normal sequence of connections, in relation to the direction of flow, is from an externally threaded nipple into an internally threaded coupling )

6. Hose coupling - Wikipedia

   en.wikipedia.org/wiki/Hose_coupling

   Also called John Morris Coupling, BS336 Instantaneous fire couplings are similar in design to the camlock fittings, and are used by; UK, Irish, New Zealand, Indian & Hong Kong fire brigades. They are available in two sizes: 1 + 1 ⁄ 2-inch INST (FETA, only available with 38 mm hose tails) and 2 + 1 ⁄ 2-inch INST (BS336).

7. Exploded-view drawing - Wikipedia

   en.wikipedia.org/wiki/Exploded-view_drawing

   An exploded-view drawing is a diagram, picture, schematic or technical drawing of an object, that shows the relationship or order of assembly of various parts. [1]It shows the components of an object slightly separated by distance, or suspended in surrounding space in the case of a three-dimensional exploded diagram.