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  1. RPF Premium Member
    Member Since
    Jun 2008
    From
    Northwest Indiana
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    163
    Nov 21, 2009, 5:15 PM - Need help with my DIY vacuum chamber #1

    Ok I have been gathering the parts to make this silicon degassing chamber and disaster struck. Well not disaster but my problem still sucks. Here is what I have
    2 stage 3CFM vacuum pump
    Vacuum gauge
    All the fittings and hose
    ĺ in acrylic
    Gasket
    Aluminum stock pot (for cooking)
    Anyway I finally put it all together and started it up. The needle on the gauge got to about 22 and the pot imploded on itself. So I realized I needed something better to use. I went to this commercial pipe place and found some 12in schedule 40 pvc that will work perfect but the only sell it in 20 ft length and it $165. I only need about 2ft so thatís not going to work. Im looking for something in the range of 12in diameter and 2ft tall give or take. Any ideas of what I can use. Hopefully someone who has made a similar setup will chime in because trial and error can be costly. Thanks
  2. BrundelFly's Avatar
    Member Since
    Dec 2001
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    Monrovia, CA
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    2,996
    Nov 21, 2009, 6:07 PM - Re: Need help with my DIY vacuum chamber #2

    Did you ask them if they had any SCRAP of that TUBE"

    Go find a contruction site..and see if they have it.

    Or check with other plastic places.
  3. saxe coburg's Avatar
    Member Since
    Jan 2004
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    Knoxville TENN.
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    Nov 21, 2009, 6:51 PM - Re: Need help with my DIY vacuum chamber #3

    That must have been a very thin cooking pot to implode... you can pick up a very heavy duty one for less than $50 that would work fine.
  4. Rebelscum's Avatar
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    Apr 2007
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    Dallas / Fort Worth, Texas
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    1,177
    Nov 21, 2009, 7:28 PM - Re: Need help with my DIY vacuum chamber #4

    My 40 quart stock pot based vacuum chamber holds a 5 gallon bucket and is .25" think, just to give you some idea of the wall thickness you'll need. Less for smaller diameter.
  5. Shat happens RPF Premium Member robn1's Avatar
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    Woodbridge, VA
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    Nov 22, 2009, 12:13 AM - Re: Need help with my DIY vacuum chamber #5

    There's some on ebay, search for PVC pipe.
  6. RPF Premium Member
    Member Since
    Jun 2008
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    Northwest Indiana
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    Nov 22, 2009, 5:10 AM - Re: Need help with my DIY vacuum chamber #6

    BrundelFly said: View Post
    Did you ask them if they had any SCRAP of that TUBE"

    Go find a contruction site..and see if they have it.

    Or check with other plastic places.
    yes i did ask with no luck, and it could take some time to find somthing the right size at the job site.


    saxe coburg said: View Post
    That must have been a very thin cooking pot to implode... you can pick up a very heavy duty one for less than $50 that would work fine.
    yes it was a cheap pot.


    Rebelscum said: View Post
    My 40 quart stock pot based vacuum chamber holds a 5 gallon bucket and is .25" think, just to give you some idea of the wall thickness you'll need. Less for smaller diameter.
    could you say what store you got it at or a brand/price range? also do the good pots tell the wall thickness on them?


    robn1 said: View Post
    There's some on ebay, search for PVC pipe.
    i looked but nothing in the right size.

    Thanks for all your help guys
  7. vaderman1701's Avatar
    Member Since
    Jun 2002
    From
    Baltimore, MD
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    Nov 22, 2009, 8:20 AM - Re: Need help with my DIY vacuum chamber #7

    I might have something you can use. It is made from PVC and about 2 feet tall. It is not at mu house right now, but I can take pictures of it on Friday and send them to you. I was going to use it for either vacuum chamber or convert it to a pressure chamber, but never got around to it.

    Scott
  8. Rebelscum's Avatar
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    Apr 2007
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    Dallas / Fort Worth, Texas
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    Nov 22, 2009, 9:21 AM - Re: Need help with my DIY vacuum chamber #8

    Sith_Lord_Hritz said: View Post
    could you say what store you got it at or a brand/price range? also do the good pots tell the wall thickness on them?
    I got mine from Ace Mart, a restaurant supply that's caters to small businesses and allows the public to shop there.

    I got the heavy duty one that indicates it's a 1/4" wall. They have some that are thinner and smaller of course.

    Mine was about $145 or so in the store.

    They are also online. http://www.acemart.com/
  9. Shat happens RPF Premium Member robn1's Avatar
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    Woodbridge, VA
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    Nov 22, 2009, 4:29 PM - Re: Need help with my DIY vacuum chamber #9

    robn1 said: View Post
    There's some on ebay, search for PVC pipe.
    Sith_Lord_Hritz said: View Post

    i looked but nothing in the right size.
    I'll assume it's safe to post the link, since it's not an auction.
    http://cgi.ebay.com/12-PVC-sch40-plastic-pipe_W0QQitemZ160334898320QQcmdZViewItemQQptZLH_De faultDomain_0?hash=item2554b46490

    12" pipe, available in 2' length.
  10. RPF Premium Member
    Member Since
    Jun 2008
    From
    Northwest Indiana
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    Nov 23, 2009, 2:55 PM - Re: Need help with my DIY vacuum chamber #10

    thanks for the link
  11. swgeek's Avatar
    Member Since
    Jan 2009
    From
    Los Angeles
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    Nov 23, 2009, 3:02 PM - Re: Need help with my DIY vacuum chamber #11

    Get a pipe coupler instead of pipe, they're about 12" long.
  12. Commando.eight's Avatar
    Member Since
    Jan 2009
    From
    Texas
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    Nov 23, 2009, 3:06 PM - Re: Need help with my DIY vacuum chamber #12

    On astromech.net somebody sells a huge 18" dia PVC tube to
    make a budget fullsize R2 droid. Not sure of the thickness, but I belive its
    near .200 thk

    James
  13. Rebelscum's Avatar
    Member Since
    Apr 2007
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    Dallas / Fort Worth, Texas
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    Nov 23, 2009, 3:10 PM - Re: Need help with my DIY vacuum chamber #13

    swgeek said: View Post
    Get a pipe coupler instead of pipe, they're about 12" long.
    That's a great idea, even if a pipe supply won't sell a foot of pipe, I bet they will sell an individual coupling.
    Last edited by Rebelscum; Nov 24, 2009 at 9:12 AM.
  14. Member Since
    Nov 2006
    Messages
    756
    Nov 23, 2009, 5:25 PM - Re: Need help with my DIY vacuum chamber #14

    Rebelscum said: View Post
    That's a great idea, even if a pipe supply won't sell a foot of pipe, I bet they will sell and individual coupling.
    Your wallet will be happier trying to source a scrap piece of pipe or buying a full pipe stick and doing a group buy with multiple people. Large diameter couplings can be very $$$. Unless you stick with a max 8 inch diameter or luck into a deal on anything larger.

    Just as an example: http://www.lascofittings.com/Product...ched40.xls.pdf

    A 10" slip coupling is $177 and a 12" is $352
    A 10" cap is $150 and 12" $195
  15. propsculptor's Avatar
    Member Since
    Jan 2002
    From
    Southern California
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    3,801
    Nov 23, 2009, 8:56 PM - Re: Need help with my DIY vacuum chamber #15

    PM Sent...

    I have a Thick Aluminum 40 QUART STOCK POT that would work fine for a Chamber, (you can fit a 5 Gallon bucket inside of it)...let me know if you are interested...
  16. Rebelscum's Avatar
    Member Since
    Apr 2007
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    Dallas / Fort Worth, Texas
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    1,177
    Nov 23, 2009, 8:58 PM - Re: Need help with my DIY vacuum chamber #16

    cheech9898 said: View Post
    Your wallet will be happier trying to source a scrap piece of pipe or buying a full pipe stick and doing a group buy with multiple people. Large diameter couplings can be very $$$. Unless you stick with a max 8 inch diameter or luck into a deal on anything larger.

    Just as an example: http://www.lascofittings.com/Product...ched40.xls.pdf

    A 10" slip coupling is $177 and a 12" is $352
    A 10" cap is $150 and 12" $195
    Wow... so much for the coupling idea.
  17. Member Since
    Nov 2009
    Messages
    39
    Nov 24, 2009, 8:08 AM - Re: Need help with my DIY vacuum chamber #17

    Rebelscum said: View Post
    Wow... so much for the coupling idea.
    You can always ask a plumber to sell you a piece of left over pipe, lots of them are willing to let them go for a couple bucks because they are mostly going to throw it away if it gets down to foot or so rather then letting it sit around and take up space in their stock
  18. Member Since
    Sep 2002
    Messages
    764
    Nov 24, 2009, 8:52 PM - Re: Need help with my DIY vacuum chamber #18

    Have you looked into an actual pressure pot? Anything designed to hold pressure in should handle pressure from the air. Here's one (haven't used it):

    http://www.harborfreight.com/cpi/cta...emnumber=66074

    And I know that Harbor Freight will often send out coupons for some percentage off a single item.
  19. Member Since
    Nov 2009
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    Nov 24, 2009, 10:39 PM - Re: Need help with my DIY vacuum chamber #19

  20. vaderman1701's Avatar
    Member Since
    Jun 2002
    From
    Baltimore, MD
    Messages
    697
    Nov 28, 2009, 1:49 AM - Re: Need help with my DIY vacuum chamber #20

    Finally had a chance to get some pictures of the container I mentioned earlier. I think this is exactly what you are looking for. I put a lid from a 5 gallon bucket on top for size comparison. I would be willing to sell it to you. Let me know.





    Scott
  21. RPF Premium Member
    Member Since
    Jun 2008
    From
    Northwest Indiana
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    Nov 28, 2009, 3:36 AM - Re: Need help with my DIY vacuum chamber #21

    thanks for the pics, i sent you a PM

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