I went from a yoke valve to the DIN valve several years ago because I understood that there would be a mandatory requirement to utilize DIN valves for cylinders charged to more than 3000 psi. I have slept since I made this decision, however, I believe that this was a requirement in continents other than North America. I have been using my DIN valve for several years now and have never had to utilize vise-grip or waterpump pliers to either tighten or lossen the 1st stage from the tank. Ralph -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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