DeanIt's more of a question than advise. If CO2 will work at 5 atm, someone on this list will hopefully correct me.Thanks --Doug JIn a message dated 10/17/2006 1:34:48 PM Central Daylight Time, Recon1st@aol.com writes:In a message dated 10/16/2006 10:26:40 PM Central Daylight Time, DJACKSON99@aol.com writes:to a liquid at just over 5 atmDoug great info. Ya just saved me time investigating the issue. I new itremained liquid at a fairly low pressure but did not think it was that low.I do plan on making 300 to 400 foot working depth.Nitrogen sounds good and maybe argon, quite a ways to that stage butfor right now I know I want the volume of this pressurized area to be minimalDean