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Old 10-02-2017, 06:20 PM   #1 (permalink)
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Copper air lines

I think we can all agree macro line sucks. The best solution is stainless tubing I know. However copper is available, cheap and easy to bend. It should easily hold 850psi. I believe The burst pressure is in The thousands. The petina would actually look cool after a couple years. Anyone try this? Or am I not seeing a potential problem with it.
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Old 10-02-2017, 06:41 PM   #2 (permalink)
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I would love to know more of your experience with this, and the fittings. I have ALWAYS hated macro lines. I go with hardlines unless I just cannot.
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Old 10-02-2017, 06:50 PM   #3 (permalink)
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This would look really sweet on a phantom build I have in mind. I'll ask a buddy who is a plumber if he can shed and light.
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Old 10-02-2017, 07:01 PM   #4 (permalink)
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Copper-nickel brake line would be the best solution... rated to nearly 3000 psi.
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Old 10-02-2017, 08:19 PM   #5 (permalink)
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Actually, copper tubing pressure rating can be way lower than you'd expect. It's all about the tubing wall thickness. Thick walled refrigerant line is way different than your hobby shop decorative thin walled tube. Don't buy anything unless you KNOW the pressure rating.
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Old 10-02-2017, 08:49 PM   #6 (permalink)
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I make stainless steel 1/4" od tubing bent to custom shapes for air hardlines. it is rated to at least 4800 psi. If brass or copper were rated to a high enough burst pressure, I would use it, but it is not.
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Old 10-02-2017, 09:19 PM   #7 (permalink)
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The TACAMO MKP (edit: it's the MKV flexi-air kit that I'm referring to) kits with the air-in-stock mod from RAP4 used a copper tube that ran through the clamshell to get the air from the hpa bottle to the powertube. I ran mine at 800psi. I'm not sure on the thickness, but it was pliable enough that if you weren't careful you could bend the edge and lose your seal.

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Old 10-02-2017, 09:20 PM   #8 (permalink)
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I'd still trust non-ferous metal tubing over plastic. Again I haven't researched this. That's why I'm inquiring.
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Old 10-02-2017, 10:06 PM   #9 (permalink)
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I'd still trust non-ferous metal tubing over plastic. Again I haven't researched this. That's why I'm inquiring.
I would definitely avoid copper.

Pressures generated in braking systems can reach up to 2000psi or more during panic stops - cupro (copper-nickel alloy trade name) brake line is rated to withstand those pressures and higher, and is extruded, so there's no seam, which makes it a great candidate to be used in a paintball application if someone's looking for hardline to replace macro.

I've personally used 3/16 brake line to plumb an Automag with no problems, but not tried 1/4" line in macro fittings. You may have issues with sealing, as the orings seem to be fairly fragile - Legolas seems to have success with his system, so obviously it can be done.

Cupro is fairly easy to shape because of it's copper content, easier than SS, so you won't need a pipe bender unless you want crisp bends.
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And God turned to Gabriel and said: “I shall create a land called Canada of outstanding natural beauty, with majestic mountains soaring with eagles, sparkling lakes abundant with bass and trout, forests full of elk and moose, and rivers stocked with salmon. I shall make the land rich in oil so the inhabitants prosper and call them Canadians, and they shall be praised as the friendliest of all people.”

“But Lord,” asked Gabriel, “Is this not too generous to these Canadians?”

And God replied, “Just wait and see the neighbors I shall inflict upon them.”

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Old 10-02-2017, 10:55 PM   #10 (permalink)
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I've got a pipe bender, that's not the issue. Just looking to keep costs to a minimum. I want to hard pipe 6-8 markers in the near future.
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