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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. Piping and plumbing fitting - Wikipedia

   en.wikipedia.org/wiki/Piping_and_plumbing_fitting

   Compression connectors on an isolating valve; the reddish part is a copper compression ring. Compression fittings (sometimes called "lock-bush fittings") consist of a tapered, concave conical seat; a hollow, barrel-shaped compression ring (sometimes called a ferrule); and a compression nut which is threaded onto the body of the fitting and ...

4. National pipe thread - Wikipedia

   en.wikipedia.org/wiki/National_pipe_thread

   These threads are now used in materials other than steel and brass, including PTFE, PVC, nylon, bronze, and cast iron. The taper on NPT threads allows them to form a seal when torqued as the flanks of the threads compress against each other, as opposed to parallel/straight thread fittings or compression fittings in which the threads merely hold ...

5. Push-to-pull compression fittings - Wikipedia

   en.wikipedia.org/wiki/Push-to-pull_compression...

   A push-in compression coupling and tee.. Push-to-pull, push-to-connect, push-in, push-fit, or instant fittings are a type of easily removed compression fitting or quick connect fitting that allows an air (or water) line to be attached, nominally without the use of tools (a tool is still usually required for cutting tubing to length and removal).

6. Cross-linked polyethylene - Wikipedia

   en.wikipedia.org/wiki/Cross-linked_polyethylene

   PEX connections can be made by pushing two matching parts together using a compression fitting, or by using an adjustable wrench or a special crimping tool. [16] Generally, fewer connections and fittings are needed in a PEX installation. [15] Non-corrosive. Unlike copper, PEX is not subject to corrosion when exposed to minerals or moisture. [15]

7. Copper tubing - Wikipedia

   en.wikipedia.org/wiki/Copper_tubing

   Compression fittings use a soft metal or thermoplastic ring (the compression ring, "olive" or "ferrule"), which is squeezed onto the pipe and into the fitting by a compression nut. The soft metal conforms to the surface of the tubing and the fitting and creates a seal.