DIY Dyson vac hack


[James Dyson] may have built eleventy billion prototypes to perfect his famous cyclonic vacuum, but sometimes just one will do the trick.

A cyclonic separator is used in workshops to keep larger cruft out of the dust collection system. The airflow inside a separator creates a vortex that flings heavier bits and particles to the periphery of the chamber, where they settle out the bottom, while relatively clean air escapes the vacuum port at the top. This makes for fewer filter changes and a more consistent pull from the vacuum.

You can go buy a fancy professionally-made separator, but [neorazz] shows how to create one from an assemblage of PVC fittings and a five gallon bucket. The design may lack the power and slick design of the big units, but for garage hack use this may be all you ever need. They demonstrate it to be about 95% effective, and it’s very simple to make. A prior cyclonic separator hack appeared a bit more work-intensive, but the principle is all the same. It all comes down to what skills you possess and what parts you have on hand.


  1. grovenstien says:

    This post sucks! He He!

  2. dnm says:

    I’ll be a happy guy when the people of the world learn the damn difference between lose and loose.

  3. Matt says:

    Don’t loose your temper, dnm

  4. grovenstien says:

    yeah losen up!

  5. Liam says:


  6. kirov says:

    gosh what a looser

  7. strider_mt2k says:

    “losest slots in town” would be more accurate, wouldn’t it? ;)

    Oh yeah hack thing good now.

  8. Doug says:

    Is it just me, or did he use way too much RTV sealant? Also, that is a “Y” connector, not a “T”.

    Sadly, I thought this was the cheaper one, but the other one is definitely cheaper. Of course, it uses duct tape, which is obviously far superior to RTV.

  9. llwynog says:

    A great deal on information on DIY cyclons can be found of Bill Pentz website:

    This is the major reference on the subject with even spreadsheets to calculate proper dimensions according to your vacuum power.

  10. ken says:

    95% efficiency sucks for a cyclonic separator. I have to wonder if it is any better than the “stick two hoses through the lid of a bucket” separator I use.

    Maybe I should write up my other non-cyclonic chip separator (this one for a 1HP dust collector). Basically a 12x10x8 y duct connector set on top of a 5 gallon bucket. Works so well I have never had to clean the dust collector bag downstream of it.

  11. neorazz says:

    95% was a guess based on empirical evidence..

    and i used that much rtv cause the prototype lid cracked clear thru under the negative pressure also why the plywood reinforcement .. i just build what i need from what i have

  12. noonevac says:

    it looks unfinished…. cant vacuum carpets with a hose. wheres the attachments.

  13. spacecoyote says:

    @noonevac: this is meant to connect to an existing central shop vac system.

  14. johon says:

    does this really “cyclon”

  15. Jim says:

    There are these lids that will do the trick too.,42401&ap=1

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