Fourmost Bulkhead Fittings for DIY CO2 - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 03-15-2009, 01:16 PM Thread Starter
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Fourmost Bulkhead Fittings for DIY CO2

I'm working on a DIY plan for CO2 that includes use of these bulkhead fittings in the caps of the 2L and gas separator bottles. It apparently negates having to deal with sealant to seal in tubing.

I'm concerned that the opening of these bulkhead fittings is so small that clogging will be an issue resulting in too much pressure build up in the 2L yeast mixture bottle..............and you know what that means..........a huge mess.

Anyone use these and did you have clogging issues?
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post #2 of 6 (permalink) Old 03-15-2009, 11:52 PM Thread Starter
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This is a picture of the Fourmost Bulkhead fittings I'm referring to.http://www3.towerhobbies.com/cgi-bin...&I=LXG849&P=FR

Last edited by roadie; 03-16-2009 at 01:36 AM. Reason: added link
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post #3 of 6 (permalink) Old 03-16-2009, 04:01 AM
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I just drilled a slightly smaller hole in the top of my bottles (than the OD of the tubing) and swore at the tubing as I forced it through. It is air tight with no sealant


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post #4 of 6 (permalink) Old 03-16-2009, 04:22 AM Thread Starter
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Great....I would much rather do the same then deal with sealants or these bulkhead fittings! Thanks!

Can't understand why so many articles mention using sealant when it seems it's not necessary
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post #5 of 6 (permalink) Old 03-16-2009, 04:29 AM
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There are many ways to do the same thing. All have their advantages and disadvantages, and only you can decide which way you want to go.

As for your original question... mostly there is air and CO2 going through these fittings. What do you expect to be clogging them? If there is some sweet sugary build-up in them you would just rinse them out when changing the solution.

Anything clogging them would be blown through before the bottles explode.

I think the issue with these plastic bulkheads is that you need to tighten them to be leak proof, but not tighten them until they crack. I imagine there is a small line there.


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post #6 of 6 (permalink) Old 03-16-2009, 04:35 AM
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A 3/16" hole works for me, cut the tube to a point an pull it through with pliers.

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