Need Advice with CO2 Set Up

[jcali10]

I'm trying to set up my 50 and ran into a problem. I think I am missing something, I can't connect the tubing to the needle valve. Not sure what part I need or where to get it. Thought this picture would help. There is a rubber gasket on the needle valve and there is that nut that screws down onto it, but it will not hold the tubing. There's no other parts. Thanks,

[Jeff120]

Thats all you need, feed the brass nut over the tubing, then push the tubing down on the nub of the regulator, tighten the nut. Are you using CO2 proof tubing? Its a little tough but it goes on.

[jcali10]

I'm using silicone tubing for now. Was advertised as CO2 resistant. After I got it I realized it wasn't exactly what I wanted.

I tried to tighten the nut over the tubing but the hole in the center of the nut is larger than the diameter of the tubing. Also the area on the needle valve above the gasket is only about an 1/8 of an inch.

What would be easier to get thicker tubing or a nut with a smaller diameter center hole?

[krisw]

Try pulling the o-ring off. Then, insert the nut and o-ring onto the silicon tubing. You should now be able to push the tubing over the rivet on the needle valve, and the o-ring should tighten down around the tubing when you screw down the nut.

[ingg]

Cut the end of the tubing at an angle, push the point through the nut, and yank it through with pliers.... try that and then see if it'll slide down to thread....

[jcali10]

I don't have to cut the tubing at an angle to get it to go through the nut. The center hole in the nut is larger than the tubing.

If I only had a 10/32 dia. female connector with the right size hose barb.

[maddog10]

The hole in the nut should be only slightly larger than the tubing (usually have to force the tubing through the hole). It is a form of compression fitting that is supposed to hold the tubing tighter as the nut is tightened down. If instructions came with the valve, double check what type and size tubing should be used.

[jcali10]

Unfortunately there is no compression, and no instructions. The ebay good deal. Where might I find the right size fitting locally. Home Depot or Lowes?

[maddog10]

You can try. Take the valve assembly and a piece of tubing and try it while in the store. Might be better to try and find larger tubing, they have some in those stores as well. The trick will be find some that works with CO2.

[jcali10]

I found this tubing called Thermoid Windshield Washer and Vacuum Tubing at an auto parts store, 6 FT for a $1.29. It fits perfectly, had to cut it diagonally to pull it through the nut. It's made from a material called EPDM. The below link is a Chemical Resistance Chart for application purposes you may find useful.
http://www.hbdthermoid.com/images/Chemi ... _Chart.pdf

I'm thinking of hooking it up without a bubble counter for now, cause I haven't made one yet, and just set the flow to a level similar to what my DIY system puts out and start using my drop checker to monitor the level of CO2.