Check valve before and after bubble counter? - The Planted Tank Forum
 
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post #1 of 11 (permalink) Old 01-30-2008, 10:04 PM Thread Starter
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Check valve before and after bubble counter?

Do i need a check valve before and after a DIY bubble counter? Additoinally if the one before the bubble counter is actually ON the regulator is it OK that the mineral oil fills the tube between the regulator and bubble counter?

THanks,
Brett

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post #2 of 11 (permalink) Old 01-30-2008, 10:05 PM
 
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I have 2 on both sides
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post #3 of 11 (permalink) Old 01-30-2008, 10:16 PM Thread Starter
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THanks Cleek. But if the second check valve is on the regulator and there is about 1 ft of tubing from bottom of bubble counter is it ok if mineral fills that section of tube between check valve on reg and bottom of bubble counter?

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post #4 of 11 (permalink) Old 01-30-2008, 10:37 PM
 
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ya its ok the co2 gas will push it up again
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post #5 of 11 (permalink) Old 01-30-2008, 10:47 PM
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i would put a second check valve between the built in check valve on the regulator and the DIY bubble counter just in case the check valve on the reg happens to go bad. If you rely on just that, there would be nothing to stop the mineral oil from entering the reg. If you had another check valve, it would give it a first line of defense and time for you to notice it and correct the problem. 2 check valves on each side is always a good thing. two on the regulator side is preferred in my opinion because regs are not cheap but check valves are!
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post #6 of 11 (permalink) Old 01-31-2008, 12:12 AM
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Two check valves, one before, one after.

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post #7 of 11 (permalink) Old 01-31-2008, 12:23 AM
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If one was going to use anything but water in their bubble counter, I'd be inclined to recommend double the check valves between it and the regulator -- they can fail after all.
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post #8 of 11 (permalink) Old 12-06-2013, 12:55 PM
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Old post, undertaker me

Anyone notices that using a checkvalve between needle valve and bubble counter makes the co2 flow on bubble checker sometimes unstable?

i see the bubbles going sometimes slower and other times faster because 1 small bubble rushes to go the the checker lol

strange to explain, but i dont know if that messes the overall efficiency of the co2


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post #9 of 11 (permalink) Old 12-06-2013, 02:20 PM
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Since my built in check valve bubble counter failed, I installed 3, 2 between regulator and bubble counter and 1 after the counter. Pressurized system shouldn't have any problem pushing the co2. I just need to eyeball the check valves if they're working properly. Remember these are cheaply made plastic and I don't have much confident in them.
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post #10 of 11 (permalink) Old 12-06-2013, 02:58 PM
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I have one made of plastic with a metal piece inside to keep pressure but this one makes the co2 unstable, it does the same to the airpump since it reduces flow,
I dunno if its defective or not but i dont wanna risk that one on the co2 system


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post #11 of 11 (permalink) Old 12-06-2013, 04:03 PM
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One way to help the check valve not fail is by putting it where it has the best chance of working correctly. I find if I put the check valve where the liquid is directly above the check valve, it is far more likely to seep through. Who came up with that idea in the first place? DUH! Doesn't water normally run downhill? So try placing the check valve so water has to travel uphill for some distance before reaching the check valve!
Of course this means the most common bubble counter/check valve is no good but I like to use what works for me, not what sells best for them!
Place your check valve off the reg and a foot or two away and you may find it works.
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