I actually have a question about air/co2 tubing ID/OD

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Matt F.

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I've noticed that a majority of the air/co2 tubing is either 3/16" ID or 1/4" ID.

When choosing a hose barb (which I am less familiar with, since I've used JBJ bubble counters), which size should I use?

Should choose a barb slightly larger than the ID of the tube?

WHich is more common?

What size ID is the ADA tubing? 3/16"? The tubing looks 1/4" OD.

also anyone know what size hose barbs jbj bubble counters have?

Thanks...
 
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Gbark

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Jun 15, 2009
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Not sure what a hose barb is!

But all your co2 fittings should have an OD slightly larger than the ID of the tubing you use. Or even better get tapered fittings;)
 
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Left C

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G

Gbark

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The Barb that let the fish get away.

Hose Barb, ok i googled it,

So as i said dont worry about wall thickness or OD just concentrate on ID if you are usng Hose Barb fittings.

I should mention that wall thickness and OD is important when using push fittings e.g ADA stuff
 
M

Matt F.

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Majority of the stuff like ADA is 4mm/6mm (ID/OD)

4mm/6mm = 3/16" and 1/4"

JBJ bubble counters have a 4mm hose barb according to aquatic magic.

There are tubes with 1/4" ID and 1/8" ID, too.

You can get co2 resistant tubing in virtually any size. Most common are the ones listed.

YOu can't go wrong with 4mm/6mm
 
L

Left C

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The 4/6mm tubing from MarineDepot doesn't stretch like most tubing that we use. It is rather stiff compared to Clippard or Tygon Lab tubing. I have to put the MarineDepot tubing in boiling water for a bit so that it will slip over whatever I want it to fit.

4/6mm tubing is 0.1575" x 0.2362"
& 3/16" x 1/4" is 0.1875" x 0.2500"
So, 4mm is 0.03" smaller than 3/16" and 6mm is 0.0138" smaller than 1/4".

A closer analogy for 4/6mm tubing would be 5/32" x 1/4". 5/32" is a tiny bit smaller than 4mm and 1/4" is a tiny bit larger than 6mm.
FROM: http://mdmetric.com/tech/cvtcht.htm
 
B

barbarossa4122

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Dec 29, 2009
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Thanks Left C. I bought some dosing bottles from US Plastic..........didn't know they have co2 tubbing.
I have just ordered 20 ft.
 
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