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Flexible PVC for CO2 ?

Discussion in 'General Plant Topics' started by AZFish1, May 4, 2005.

  1. AZFish1

    AZFish1 Junior Poster

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    Lee's sells a black "stealth" airline tube. I emailed them and they say it is flexible PVC. This safe or have any loss issue in a CO2 application?
     
    #1 AZFish1, May 4, 2005
  2. Tom Barr

    Tom Barr Founder
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    Re: Flexible PVC for CO2 ?

    Should be okay.
    Silicone is one of the best for $.
    Thicker gauge is even better.

    Regards,
    Tom Barr
     
    #2 Tom Barr, May 4, 2005
  3. AZFish1

    AZFish1 Junior Poster

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    Re: Flexible PVC for CO2 ?

    I have read a few times now that silly-cone has a high rate of loss and that poly or vinyl are better. Is this only under high pressure?
     
    #3 AZFish1, May 4, 2005
  4. Paul

    Paul Guru Class Expert

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    Re: Flexible PVC for CO2 ?

    I was under the same impression, I am using pvc tubing as i was told by some one who remains nameless that silicone leaks c02?
     
    #4 Paul, May 4, 2005
  5. Tom Barr

    Tom Barr Founder
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    Re: Flexible PVC for CO2 ?

    No, standard silicone line is about a 1% loss per ft.
    Vinyl is about 5%.

    Thicker silicone will be even less.
    1% ain't much, all tubing leaks if you want to really get down to it, but not very much when you get to silicone and ploy urethanes etc.

    Regards,
    Tom Barr
     
    #5 Tom Barr, May 4, 2005
  6. Ian H

    Ian H Guru Class Expert

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    Re: Flexible PVC for CO2 ?

    I bought what was sold as CO2 tubing, no idea what it's made of though, sort of grey looking and quite thick walled compared by normal airline.

    Lateral thinking kicking in, on the loss rate of PVC if you coil 20 foot of tubing inside your tank that would make 100% loss...........All of the CO2 being diffused. Difficult to hide though, how about undergravel CO2? :D

    Ian
     
    #6 Ian H, May 5, 2005
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