Using 12g's and macroline

[OPBN]

I once tried using macroline on a Tippmann 98 before that I was running on CO2. Pretty shortly after setting it up, one of the fittings failed and I ended up getting rid of the macroline and went back to SS lines. I have since seen other posts that macro and CO2 don't get along so well. Asthetically, I really prefer macro line and fittings. Would I run into this same issue using macro fittings on a pumpmag and 12g's? I realize it is still CO2, but would the reduced amount change the equation? Should I just plan on incorporating SS lines? I really want to be able to use an on/off with a front output, SS lines would make this impossible/difficult.

Sorry if this is considered a double post as it didn't seem to be exclusive to my pump project thread.

[Newt]

If you're running pump, it's probably not going to be an issue unless you're regularly handling it so liquid is flowing in. There's no ROF issue like on a semi auto.

I'm not sure why the actual fitting would fail because of CO2 though.

Alternately, you could use stainless hard line. That would be pretty sweet.

[OPBN]

If you're running pump, it's probably not going to be an issue unless you're regularly handling it so liquid is flowing in. There's no ROF issue like on a semi auto.

I'm not sure why the actual fitting would fail because of CO2 though.

Alternately, you could use stainless hard line. That would be pretty sweet.

Not 100% sure it was the CO2 that caused the fitting to fail, but after mine failed I read a couple of times that the two don't mix well. I upgraded to HPA shortly after so I never ran into the issue again. Hadn't thought about SS hardline. Might have to look into that. Anyone have a good source for it?

[Newt]

Brake shop? I'm not 100% sure on that either, it might be a good start if google fails.

[athomas]

Macro line will work fine with CO2. You have to be careful when buying macroline. Sometimes it and the fittings aren't rated at a high enough rating for the pressure we are running at.

[OPBN]

Macro line will work fine with CO2. You have to be careful when buying macroline. Sometimes it and the fittings aren't rated at a high enough rating for the pressure we are running at.

I thought it had something to do with the extreme cold that CO2 produced that caused the fittings to fail? Maybe I just had bad luck before.

[athomas]

CO2 doesn't cause enough cold for most metals to become brittle, plus the metal would absorb heat faster than the CO2 could reduce the heat as the temperature went down. CO2 only produces -78 degrees Celcius which is not a low temperature at all in the scheme of metal freezing, even if it could instantly lower the temperature of the metal in a perfect setting.

[OPBN]

CO2 doesn't cause enough cold for most metals to become brittle, plus the metal would absorb heat faster than the CO2 could reduce the heat as the temperature went down. CO2 only produces -78 degrees Celcius which is not a low temperature at all in the scheme of metal freezing, even if it could instantly lower the temperature of the metal in a perfect setting.

I thought it caused the o-rings in the fittings to fail? I guess it doesnt really matter, as long as they hold up. Thanks for the input.

[athomas]

I thought it caused the o-rings in the fittings to fail? I guess it doesnt really matter, as long as they hold up. Thanks for the input.

When you mentioned "failed", I thought you meant "broke". But, even so, static oring seals that are under compression shouldn't be affected.

Loose fitting orings or moving orings cold change dimensions and leak. Once they start leaking, the additional freezing on the sealing surface contributes to the problem. That is why valve orings could fail where macroline orings would not.