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At 09:03 AM 2/23/99 -0800, Sean T. Stevenson wrote: >Robert, have you removed a valve knob and seen how large the stem is? >This is not, IMO, a non-existent problem. In addition to that, >consider the possibility of tank neck o-ring extrusion... not common, >but it does happen, as has been attested to by several list members. >The isolator solves both problems. I once had a burst disk blow out during a dive. The disk had become corroded from exposure to salt water and was weakened to the point where it failed during the dive. Without an isolator, it would have been a very unpleasant dive. As tech and cave divers, we go to such extremes with gear redundancy, that it doesn't make sense to dive without an isolator and run the risk of an extruded o-ring or failed burst disk defeating the gear redundancy. -Mike -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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