Don't have any firsthand experience but have read that a welding gas distributor is the cheapest place for O2.
It has to be very pure to get good welding results so is also good for breathing.
Warning: As with free advice use at your own risk.....
Glenn
__________________
_____________________________________________
RV-4 Sold
N654RV @ MLJ
RV-7 Coming Soon
N987RV Reserved
2015 Donation Gladly Paid
"Maintain Thy Airspeed, Lest the Earth Arise and Smite Thee"
|