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Ted wrote: > While it is unlikely that there will be any contamination in >the tank, the possibility still exists, and the customer knows they >should leave some gas in the tank and the valve closed. So I have >a firm policy of visually inspecting every tank that comes into >the store empty with the valve open. And I have a firm policy of always sticking in a hundred psi or so into a completely empty tank before I take it for a fill :-) Actually, I think he was talking about refilling straight O2 tanks in a commercial operation. From what I can tell, the rest of the CG industry doesn't share the dive world's concern about empty tanks - my O2 dealer insists that the tanks should be returned completely empty! We often open the valve all the way when we leave them outside for pickup. Certainly, if you are vacuuming the tank, it's a lot easier if they don't have leftover gas in them. But then the CG suppliers don't (normally) have to worry about salt water - the amount of contaminants that are likely to get into a med or industrial O2 tank are pretty insignificant when salt water, pressure and immersion are not a concern. Just out of curiousity, Ted, do you do a full visual, and charge for it, or a free peek for contiminants visual? -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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