Tank O-ring?

[BiNumber3]

Hey, was wondering what kinds of o-rings i can use between the tank and the regulator on hp tanks? At the moment I have buna and urathane o-rings

[Coralis]

either should work as long as they are the right size , though the urethane will probably last longer especially if you are using CO2.

[BiNumber3]

ah ok thanks, just wanted to make sure before i stuck one on that shouldnt be put there

[Gas mask]

Yeah, buena o-rings expand and de-form when they come in contact with CO2. But since they are a tad softer they give a better seal. Both have pros anc cons.