Monthly Archives: November 2013

  • Molded vs Fabricated Fittings

    What is the difference? - Molded vs Fabricated Fittings

    Injection Molded vs FabricatedIn the world of PVC fittings there are two main types of construction. The majority of fittings available on the market are what is called molded. That means they are made by injecting hot plastic into a pre-made mold. This technique is generally used for the best-selling fitting types and sizes as it lends itself to mass production.

    The other way PVC (and CPVC) fittings are made is by fabrication. This is a more involved process that involves using PVC parts to create a new fitting. Manufacturers may cut, weld, and bend PVC to construct a fitting that cannot be easily molded. As you can imagine, this process is less automated than injection molding. For this reason, fabricated fittings tend to be more expensive than standard parts. They also are usually large diameter or rarely used fittings. Some manufacturers choose to fabricate some parts because it is more cost effective than creating a special mold for something that will rarely be used.

    On the flip side of this, some manufacturers like Spears have started to make lines of injection molded large diameter fittings. Builders and contractors sometimes prefer molded fittings because they are made from one solid piece and their dimensions tend to be more accurate. You can usually tell a molded fitting from a fabricated fitting by the part number. Fabricated fittings will usually have an “F” at the end while molded fittings will not.


  • What is PVC Duct?

    What is PVC Duct?

    PVC DuctPVC pipe has long been valued for its durability and ease of use. This plus the added benefit of being cost effective have made PVC pipe into one of the most widely used materials in the world. It isn’t surprising that other industrial and consumer products are also made of this versatile material. One such product is PVC duct. Used mostly by contractors and builders, PVC duct is a thin walled version of traditional PVC pipe. Because of its thin walls, duct is not used to carry pressurized liquids like standard pipe. Instead, it is used for light drainage, fume, and exhaust applications.

    PVC duct is impressively strong and it possesses a host of other beneficial qualities like low thermal conductivity, flammability properties, and chemical and corrosion resistance. PVC duct pipe comes in sizes from 2 inch all the way up to 60 inch! Depending on size, duct can be made two ways: by extrusion or by rolling PVC sheet. Generally, smaller sizes are extruded while larger sizes must be rolled.

    PVC Fittings Online is proud to carry an extensive line of PVC duct and fittings. Like standard PVC pipe, duct has a large selection of fittings that connect straight duct pieces together. These are available in the same range of sizes, and they are connected using solvent cement or hot air welding. We source our duct from two top quality manufacturers – Harrison Machine & Plastic and Spears Manufacturing.


  • PVC Kids Growth Chart Idea


    PVC Kids Growth Chart Idea

    Keeping children's height charts has long been a treasured family tradition. Surprisingly though, there has never been a great way of documenting and keeping it. You've probably seen on TV or in movies where parents will mark their kids' heights against a door frame in the house. That's very accessible and sweet, but what happens when it's time to move? And who really wants to write all over their door frames anyway?

    Another alternative, which my parents used till I outgrew it, is a folding paper height chart (the kind that come in baby books). This is easy to transport in a move, but something about a folding piece of paper loses the nostalgia of a classic height chart. I was thinking about this the other day when I came up with a great idea that allows you to have a physical representation of your children's growth that is easy to take along through moves.

    The answer? PVC! PVC pipe is cheap, sturdy, and can be decorated and marked on to showcase your family's unique history and character.

    Want to make your own? Choose a piece of PVC pipe that is sturdy enough to stand on its own. I recommend 3" or 4" schedule 40 PVC pipe. You can find this at any home improvement store or order it online. Give your kids some room to grow and have the piece stand at least 6 or 7 feet tall. That way the chart can follow them all the way to their full height!

    You can decorate the PVC however you wish to reflect your family or children. If you want you can mark the pipe with foot and inch measurements. Just lay a tape measure out beside the pipe and mark with a permanent marker. When it's time to measure your little one, stand the pipe up on a flat surface and have the child stand with her back to the pipe. Mark where the top of her head falls and write her name and the date next to it. That's it!

    What a fantastic family keepsake! If you wanted, you could do one chart for each child and pass it along to them for their own children. How fun to be able to track their child's growth alongside their own!


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