skynscuba
Contributor
When I got some new tanks for my fiancee, I had them O2 cleaned. A year later, when vis was done, they had only been filled twice, both at the same shop with Nitrox, but they were no longer "O2 clean" without paying to clean them again at the annual.
The whole thing is kinda odd. I could have filled those tanks a hundred times from a dirty compressor somewhere, and the shop would have been happy to blend in them a week before vis expired (since they would have no way to know), or the tank could have only been filled by them one time when first cleaned, and would require a new clean at the annual. The whole O2 clean thing seems to rely too much on trust.
Anyway, there are local places to get banked 32 or 36, so I no longer keep the tanks O2 clean.
The whole thing is kinda odd. I could have filled those tanks a hundred times from a dirty compressor somewhere, and the shop would have been happy to blend in them a week before vis expired (since they would have no way to know), or the tank could have only been filled by them one time when first cleaned, and would require a new clean at the annual. The whole O2 clean thing seems to rely too much on trust.
Anyway, there are local places to get banked 32 or 36, so I no longer keep the tanks O2 clean.