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Thread: Setting up dust collector

  1. #1
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    Setting up dust collector

    I'm setting up a dust collector I got from Grizzly wall hung, and ready for some ducting now, some one said try 4" plastic sewer pipe has anyone used this before?

    Dennis

  2. #2
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    I have used a lot of 4 inch plastic "Sewer and Drain" pipe, but much of it has also been replaced with 6 inch S&D. 6 inch is a lot more expensive, but not as expensive as buying both 4 inch and 6 inch, when you want more capacity. (My main runs are now all 6 inch).

    If it is a cyclone, be sure the pipe comes in straight for the last few feet, so the air and chips are flowing in a stream rather than turbulent as they enter the cyclone. That makes a big difference in the efficiency.
    Charlie Plesums, Austin Texas
    (Retired early to become a custom furnituremaker)
    Lots of my free advice at www.solowoodworker.com

  3. #3
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    For clarity's sake, there is a difference in PVC pipe. The Sewer and Drain (S&D) mentioned above will have a thin wall thickness and the pipe will be marked ASTM 2729. This pipe is used primarily for drain field installations and can be a little harder to find. Even with the thinner wall thickness, this pipe is perfectly fine to use for dust collection systems.

    PVC Sewer Pipe has a thicker wall thickness than the S&D pipe but the same outside diameter. This pipe will be marked ASTM D3034 on the outside of the pipe. Normal PVC sewer fittings will fit both 2729 and 3034 pipe.

    The other alternative is PVC DWV Drain Pipe. This is the most expensive route to go and quite frankly IMO over kill. It will carry a marking on the outside of Sch. 40. This pipe has an even thicker wall and the outside diameter is different than the two other PVC pipes. You would need to use PVC DWV rated fittings with this pipe.
    Dave

  4. #4
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    First an easy answer; yes people use PVC, ABS and others for dust collection. No there is not an explosion or fire risk in your home shop (way too much discussion on this near-myth).

    I'm also on 6" S&D (ASTM-2729). When you say wall hung and ask about 4" pipe I assume this is a wall hung 'blower and bag' not a wall hung cyclone of significant power. Any DC can be impacted by the air mass in the pipe it has to move. Longer pipe/hose equals more captured mass that must be put in motion. The perceived (and actual) performance of the DC can be negatively affected by too much length of duct. The reason for all this preliminary blah, blah is that you can end up very dissatisfied if you strap 30 feet of hose or pipe to a small blower.

    A given length of rigid pipe will add less drag than the same length of hose unless you get that really cool hose that is super tough and very smooth on the inside at about $10+ per foot . So your pipe will be better than hose but, either of a given length will kill your airflow. If you plan to use a hose to connect this device to one machine and then another (probably its intended use) I would locate the blower centrally, if possible, rather than run pipe to the centralized area and then take off with a hose.

    On the other hand I may have missed the whole point of your question and am just rambling along until the coffee kicks in

    P.s. My dad has a bunch of schd 40 pipe because he got it for a song from an irrigation outfit going out of business. He has cursed the weight of the darn stuff ever since. Especially when wanting to make a minor change which is so easy with thinner plastic ducting.
    Last edited by glenn bradley; 11-16-2014 at 04:00 PM.
    Any sufficiently advanced technology is indistinguishable from magic.
    - Arthur C. Clarke

  5. #5
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    My shop is 22 x 42 and most of the machines are at one end.. So I'll only need and 20 feet of pipe and then drop drop to the machines. My plan is for 2 DC one on each side of the shop wall hung with bags.. But being on a budget it's one side at a time till I start sell some stuff.

    Dennis
    old yankee workshop

  6. #6
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    If using the PVC, be sure not to use 90* elbows, use two 45* elbows with about a 6" piece of pipe between them instead. A 90* will slow down the air flow more than using two 45's. If you can find them they do make a longer sweep 90 that can be used, but they are hard to find.
    Darren

    To a small child, the perfect granddad is unafraid of big dogs and fierce storms but absolutely terrified of the word “boo.” – Robert Brault

  7. #7
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    Quote Originally Posted by Dennis Gerard View Post
    My shop is 22 x 42 and most of the machines are at one end.. So I'll only need and 20 feet of pipe and then drop drop to the machines. My plan is for 2 DC one on each side of the shop wall hung with bags.. But being on a budget it's one side at a time till I start sell some stuff.

    Dennis
    old yankee workshop
    Sounds like you're sold on it. As Darren points out, 90* elbows and T-connections are a no-no as they are real performance killers. I 'wye' out to the hose connections and do the dual 45* connections as described. My setup has changed but, here's an example from earlier years.

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    Last edited by glenn bradley; 11-21-2014 at 09:48 PM.
    Any sufficiently advanced technology is indistinguishable from magic.
    - Arthur C. Clarke

  8. #8
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    Thanks for the help with that! got a good idea now what I need...
    Dennis
    https://www.facebook.com/oldyankeeworkshop

    Check my facebook page and like it please

  9. #9
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    Billings Missouri near Springfield Mo
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    I am running Poly S & D pipe that I got from Home Depot. They stock 4" but I had to order in the 6" it run a little over $14
    A Turn N Time
    Components for John Smith Organs and the Hobby Organ Builder

    Frog Pond Guitars


    Before you criticize someone, you should walk a mile in their shoes. That way, when you criticize them, you're a mile away and you have their shoes.

  10. #10
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    It looks like Dennis, has his question answered. So if I could add one more question on this thread to save starting another. I have 25 year old version of this Grizzly collector:



    http://www.grizzly.com/products/1-HP...ollector/G8027


    Would this machine be big enough to handle a collection system in a 20x28 shop? Right now it is used on the planner and sometimes on the table saw. I have a Shopvac that I move around for my small tools. Can't afford a bigger machine and afraid to spend the money for ducting, gates, fittings if what I have can't handle it.

    Thanks guys.....
    Last edited by Royall Clark; 11-21-2014 at 09:02 PM. Reason: forgot to add Dennis' name!
    Aloha,

    What goes around, comes around.

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