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  2. Cross-linked polyethylene - Wikipedia

    en.wikipedia.org/wiki/Cross-linked_polyethylene

    A cross-linked polyethylene (PEX) pipe. Cross-linked polyethylene, commonly abbreviated PEX, XPE or XLPE, is a form of polyethylene with cross-links.It is used predominantly in building services pipework systems, hydronic radiant heating and cooling systems, domestic water piping, insulation for high tension (high voltage) electrical cables, and baby play mats.

  3. Plumbing - Wikipedia

    en.wikipedia.org/wiki/Plumbing

    These sizing schemes allow for universal adaptation of transitional fittings. For instance, 1/2" PeX tubing is the same size as 1/2" copper tubing. 1/2" PVC on the other hand is not the same size as 1/2" tubing, and therefore requires either a threaded male or female adapter to connect them.

  4. Piping and plumbing fitting - Wikipedia

    en.wikipedia.org/wiki/Piping_and_plumbing_fitting

    A common type of this style fitting is a "hex bushing" with a hex head for installation with a pipe wrench. A double-tapped bushing is more compact than a reducer but not as flexible. While a double-tapped bushing has a more minor female thread concentric to a larger male thread (and thus couples a smaller male end to a larger female), a ...

  5. Electrofusion welding - Wikipedia

    en.wikipedia.org/wiki/Electrofusion_Welding

    Electrofusion welding is a form of resistive implant welding used to join pipes. A fitting with implanted metal coils is placed around two ends of pipes to be joined, and current is passed through the coils.

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  7. Injection moulding - Wikipedia

    en.wikipedia.org/wiki/Injection_moulding

    Video explanation Small injection moulding machine showing hopper, nozzle and die area. Usually, the plastic materials are formed in the shape of pellets or granules and sent from the raw material manufacturers in paper bags. With injection moulding, pre-dried granular plastic is fed by a forced ram from a hopper into a heated barrel.

  8. List of This Old House episodes (seasons 11–20) - Wikipedia

    en.wikipedia.org/wiki/List_of_This_Old_House...

    The job has suddenly taken a turn for the better, thanks in part to the homeowners' cleanup efforts. The crew installs the double front door, and electrician Paul Kennedy shows us the centralized audio/video/telephone wiring system he's installing. Norm continues his visit to the Forest Products Lab, where he sees recycled wood and paper ...

  9. Pexels - Wikipedia

    en.wikipedia.org/wiki/Pexels

    Pexels provides media for online download, maintaining a library that contains over 3.2 million photos and videos, growing each month by roughly 200,000 files. [1] The content is uploaded by the users and reviewed manually. Using and downloading the media is free, the website generates income through advertisements for paid content databases.