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Diy Co2 Injector (Paintball, Not Pop Bottle)


nathan
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So I was looking around today at some Co2 injectors. I can't believe how much they cost. Ideally, I was wanting on that would connect to a paintball tank, but the only one I was able to find locally was $200. I currently have a Fluval pressurized kit and for now have just made something like that. I'll be adding a gauge and such later on if I need to. I figured there's got to be a cheaper way to go than to buy the $200 kit though. Here's my results...

Tube to MIP elbow with Insert - $3.99

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Compression needle valve - $5.19

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1/4 X 20' Clear vinyl tubing - $5.19

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Connector for paintball tank - $20.00 (From Prevost Paintball in Edmonton Alberta)

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Leatherman tool - $40 (Ok, I didn't really NEED this, but I WANTED it)

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The final product...

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Total cost for actual needed supplies - $34.37

Now I know there is no solenoid on here, I will be looking into adding one as well. Basically, I'm just re-creating the Fluval system to use a paintball tank instead of a $25 Co2 cartridge.

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If the paintball canister already has a gauge on it to know when it's getting low, I think you've got all that you need! Nicely done! :thumbs:

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I would honestly suggest putting a regulator on that. If your needle valve or something else clogs for any reason you have a bomb under your tank..

http://www.plantedtank.net/forums/general-planted-tank-discussion/155384-my-co2-line-exploded.html

exact same setup as you have.

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I would honestly suggest putting a regulator on that. If your needle valve or something else clogs for any reason you have a bomb under your tank..

I have a propensity to over-engineer... will an inline regulator (fixed orifice) work ubr0ke? I've only seen regulators for peumatic cylinders/tools. http://www.homedepot...e-1-4-in/902681

Having a gauged air regulator (placed between your needle valve and tank) will tell you what your regulated pressure is nathan. A different purpose than having a gauge on your tank (though useful too!). If an inline regulator isn't adequate, then add a pr of tube to 1/4" NPT (or 1/8 NPT).

Edited by Fisher
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ok so I've tossed away all the supplies I had prior and have gone with a different method. Here's the pics.

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The old hose had a burst pressure of around 300 PSI, the new hose is around 700 PSI. I've added a regulator ($20 at Princess auto, God I LOVE that store), and I'll be adding a needle valve somewhere before the tank. I've got the hose attached to a brass barb without a clamp so that if the needle valve fails or gets blocked, it SHOULD pop the hose off the barb rather than blow the hose.

Edited by nathan
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co2 tanks are 900-1200 psi...

honestly not to kill your momentum but I could help you piece together a 2 stage high purity gas regulator, solenoid, and decent needle valve. for 120 bucks...thats a lab quality setup with no worries..

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a 2 stage high purity gas regulator, solenoid, and decent needle valve. for 120 bucks...thats a lab quality setup with no worries..

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Poor quality line components (and applying teflon tape below pipe threads) can throw debris into your air circuit and cause the problem you're trying to avoid by adding a regulator in the first place nathan. A 20oz paintball tank will produce an fairly impressive sneeze compared to a 20g or 80g CO2 cartridge. ;)

Edited by Fisher
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