STILL can't figure out this Fabco needle valve - The Planted Tank Forum
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post #1 of 56 (permalink) Old 02-03-2008, 11:20 PM Thread Starter
 
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Exclamation STILL can't figure out this Fabco needle valve

What working pressure am I supposed to be using? When I attach the Fabco inline (I think I did it right), and then I open the Milwaukee needle valve all the way, the pressure blows the tubing off even when the Fabco is closed. The bubble counter looks like it's going to explode. I would really like to get this system set up tonight, so I can watch the fish for a few hours.
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post #2 of 56 (permalink) Old 02-03-2008, 11:40 PM
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Any pictures of what you're doing so we can see and help fix the problem? I use a working pressure of 25psi.


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post #3 of 56 (permalink) Old 02-03-2008, 11:41 PM Thread Starter
 
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No. I need to get a digital camera big time.
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post #4 of 56 (permalink) Old 02-03-2008, 11:42 PM Thread Starter
 
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Mine is at a little less than 30 psi. I kept it like it was b/f I tried to add the Fabco.
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post #5 of 56 (permalink) Old 02-03-2008, 11:42 PM
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Quote:
Originally Posted by loachlady5 View Post
What working pressure am I supposed to be using? When I attach the Fabco inline (I think I did it right), and then I open the Milwaukee needle valve all the way, the pressure blows the tubing off even when the Fabco is closed. The bubble counter looks like it's going to explode. I would really like to get this system set up tonight, so I can watch the fish for a few hours.
...you want the Fabco open, even just a little bit.

Crank open the Fabco all the way open. Then crank open the Milwaukee needlevalve all the way open. Does the tubing blow off?
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post #6 of 56 (permalink) Old 02-03-2008, 11:50 PM Thread Starter
 
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Originally Posted by epicfish View Post
...you want the Fabco open, even just a little bit.

Crank open the Fabco all the way open. Then crank open the Milwaukee needlevalve all the way open. Does the tubing blow off?
No, it did not blow off. But the powerhead sure freaked out.
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post #7 of 56 (permalink) Old 02-04-2008, 12:03 AM
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OK, now slowly close the Fabco to the rate you want.
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post #8 of 56 (permalink) Old 02-04-2008, 12:12 AM Thread Starter
 
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Ok, I did that. The bubbles coming out of the powerhead are low, but the bubble counter behind the Fabco is going crazy. According to this thread, the bubble counter should still work:

https://www.plantedtank.net/forums/eq...new-fabco.html

Also, when I turn the old needle valve all the way open, the tubing still blows off. It is the light blue silicone tubing. The Fabco is really heavy. Does this have anything to do with it?
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post #9 of 56 (permalink) Old 02-04-2008, 12:14 AM
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1) Bubble counter behind? You mean before the Fabco? Give it a few minutes for the pressures to stabilize.

2) The light blue silicone tubing is bad for your CO2 system. It leaks a lot of CO2. Use polyurethane or even vinyl tubing.

3) No, the actual physical weight of the Fabco doesn't matter. Just make sure the tubing isn't kinked anywhere.

Let us know how the bubble rate stabilizes after a few minutes.
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post #10 of 56 (permalink) Old 02-04-2008, 12:41 AM Thread Starter
 
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Yes, before the Fabco.

I just replaced the tubing with black vinyl tubing.

I waited a long time - did not stabilize. I had to turn it back down (the knob on the old needle valve).
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post #11 of 56 (permalink) Old 02-04-2008, 01:33 AM Thread Starter
 
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shameless bump...
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post #12 of 56 (permalink) Old 02-04-2008, 01:45 AM
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the fabco is barbed on both ends, right? The only thing I can think of is that it is a really open leak where the tubing connects to the barb on the fabco that would cause this problem. The barbs should hold the tubing on and not let it get blown off like you originally described it.


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post #13 of 56 (permalink) Old 02-04-2008, 01:48 AM Thread Starter
 
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It's not "blowing" anymore. No leak - atleast I don't think. The only problem remaining is that the bubble counter is going haywire. I thought from the other post that my bubble counter would still work.
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post #14 of 56 (permalink) Old 02-04-2008, 01:52 AM Thread Starter
 
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Does it matter which barb I attach the tubing from the original needle valve to?
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post #15 of 56 (permalink) Old 02-04-2008, 01:55 AM
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Quote:
Originally Posted by loachlady5 View Post
Mine is at a little less than 30 psi. I kept it like it was b/f I tried to add the Fabco.
30 psi seems high to me. I set mine to 11 following Rex's set-up guide:

http://www.rexgrigg.com/regset.html

i would think even with that different valve you have, 30psi might be too high.


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