Polyethylene (RO Tubing) vs. Airline for Dosing?

Discussion in 'Equipment' started by kinetic, Jan 8, 2018.

  1. kinetic

    kinetic Webmaster

    I'm setting up a dosing pump (Neptune DOS) and was wondering if I should use Polyethylene tubing (I have a ton left over from my RO/DI setups) or the neptune airline tubing.

    I have probably 10 feet of polyethylene (both translucent and opaque), and a handful of elbow connectors. I'm not a huge fan of dangling limp airline tubing everywhere, especially since the DOS needs that special Neptune sized airline. I did order it already, but the kinks in it are troubling.

    I'm leaning towards the RO tubing, but wanted to see if that wouldn't be a good choice for some reason?
  2. scuzy

    scuzy Supporting Member

    They work fine on dos. I use that for dosing nopox

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  3. ashburn2k

    ashburn2k Webmaster

    Me too

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  4. Thank you for being brave enough to speak up and share your truth *hug*.
  5. Vhuang168

    Vhuang168 Supporting Member

    Depends on the RO tubing. The Neptune line is softer than what we find traditionally which helps with the compression fitting.

    If you start getting bubbles in the line and losing prime, check the line for cracks under the compression nut.

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  6. Flagg37

    Flagg37 Officer at large

    I’ve only ever used the RO tubing with my DOS. I couldn’t tell you if the tubing that comes with it’s is any better. It is a tight fit though, so warm it up and jamb it on there good.
    kinetic likes this.
  7. kinetic

    kinetic Webmaster

    OK I got the john guest fitting adapters, and I'll be using RO tubing!

    Thanks all!
  8. sfsuphysics

    sfsuphysics Supporting Member

    Wait what? It doesn't use standard sized hose? Or it uses something other than 1/4"?
  9. kinetic

    kinetic Webmaster

    I tried different sized airlines, nothing worked. I know Neptune sells their own tubing, and it seems like most people have to buy that.
  10. Edgar Sandoval

    Edgar Sandoval Supporting Member

    How much tubing do you need? I have some Neptune’s tubing

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  11. kinetic

    kinetic Webmaster

    Hey Edgar, I ended up getting some from Neptune directly, but now I'm just using RO tubing so I have 16 meters brand new sitting in my closet haha.
  12. kinetic

    kinetic Webmaster

  13. Flagg37

    Flagg37 Officer at large

    I’m pretty sure Neptune uses 6mm which is just a hair under 1/4”.
  14. scuzy

    scuzy Supporting Member

    Warm it up in hot water an push it in how I did it.

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