Does Fill Express require that my Nitrox cylinder be suitable for nitrox service?
Fill Express recommends, but does not require, all cylinders used for breathing gases other than air should be Nitrox Ready. Fill Express follows the “40% Rule” guidelines of our training agency affiliation with IANTD. This means any Nitrox mixture, premix or custom blend, at Fill Express less than or equal to 40%, does NOT require that your cylinder and valve be Nitrox Ready because our Nitrox is premixed before entering your cylinder, not partial-pressure blended with 100% Oxygen in your cylinder. Any Nitrox exceeding 40%, including our premix 50% and 80% Nitrox, DOES require that your cylinder and valve be Nitrox Ready.
