Karl, Why does everything have to be idiot proof. This is up there with making guns safe for children, or to sue a tobaco company because you got ill from smoking. People got to take some responsebility for their action, and without propper education/knowledge/certification one should not handle any O2 or high EANx mixes anyway. These valves are ways to make money, at our expence, nothing else. Preben -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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