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2. 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

3. AN thread - Wikipedia

   en.wikipedia.org/wiki/AN_thread

   AN fittings are a flare fitting, using 37° flared tubing to form a metal-to-metal seal. They are similar to other 37° flared fittings, such as JIC , which is their industrial variant. [ 2 ] The two are interchangeable in theory, though this is typically not recommended due to the exacting specifications and demands of the aerospace industry.

4. Piping and plumbing fitting - Wikipedia

   en.wikipedia.org/wiki/Piping_and_plumbing_fitting

   Push-to-pull fittings are easily removed compression fitting that allows pipes to be connected with minimal tools. These fittings are similar to regular compression fittings but use an O-ring for sealing and a grip ring to hold the pipe. The main advantage is that it can easily be removed and re-used, it is easy to assemble, and the joints are ...

5. Electrical conduit - Wikipedia

   en.wikipedia.org/wiki/Electrical_conduit

   Electrical metallic tubing (EMT ... 1/2: 16: 30: 13.6: 0.706: 17.9: 0.042: ... The other end of the fitting usually has a screw or compression ring which is tightened ...

6. National pipe thread - Wikipedia

   en.wikipedia.org/wiki/National_pipe_thread

   The half-angle (between the taper surface and the axis of the pipe) is arctan(1 ⁄ 32) ≈ 1.7899° ≈ 1° 47′. The standard for Nominal Pipe Size (often abbreviated NPS, which should not be confused with the abbreviation NPS for the straight thread form standard) is loosely related to the inside diameter of Schedule 40 series of sizes.

7. Threaded pipe - Wikipedia

   en.wikipedia.org/wiki/Threaded_pipe

   Therefore many municipal plumbing codes restrict the use of threaded plastic pipe fittings. Both British standard and National pipe thread standards specify a thread taper of 1:16; the change in diameter is one sixteenth the distance travelled along the thread. The nominal diameter is achieved some small distance (the "gauge length") from the ...