Hooking up EVABarrier tubing to a 5/16" barb input?

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Can someone share a link to a study which demonstrates the importance of using barrier tubing to prevent oxygen ingress into beer?

I looked a bit and didn't see it either. Started to spread the search to ingress of any gas through tubing from low to high pressure, but was at and am again at work without a ton of time. Genuinely interested as well.

I mentioned what I've seen w/ He leaks but will admit it could be apples / oranges. Other gasses may have to do.

Meters exist, if anyone owns one it wouldn't be a super difficult experiment. Drop one into an empty keg, hook up a CO2 line, and see what happens. Assuming the meter is good and doesn't drift, etc.

 

[Horseflesh]

I don't know how to calculate O2 ingress into a CO2 line and finished beer... college physics was a long time ago. But since I can apparently just use the 5 mm EVAbarrier tubing on the gas supply barbs that are already in place, and Duotight/4mm on the output barbs, there is no reason not to do it.

I will just have to live with whatever O2 comes in my CO2 cylinders. Having a pressurized CO2 source is too convenient to give up.

 

[Horseflesh]

I just soaked the end of the EVA tubing and a small tapered punch in hot water and used the punch to stretch the diameter of the tubing until they fit over the barbed ends.

I may as well give this a try first. Is that 5 mm EVAbarrier for the gas and 4 mm for liquid?

 

[day_trippr]

fwiw, I went with 4mm ID for beer and 5mm for gas...

Cheers!

 

[Horseflesh]

I think I have my shopping list together, thanks guys. I am going to try to keep the existing barbs and if I don't like how that goes I can always move to Duotight.

 

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If they are hard to slip onto the barbs, the earlier mentioned tips will be necessary. A tapered punch helps the lines get stretched a bit. Warm water is great too, not steaming hot but slightly uncomfortably warm. Dip the line, and also the punch and barb to maintain heat, and tinker until you get it stretched and assembled. Might take a few practice runs. Too soft and the line will crumple. It's do-able, but takes a bit of (quickly learned) skill.