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> > "JUHA FLINKMAN" wrote > > ********** > During thousands of dives with Poseidon regs in our club, > there has been one single incident of reg freezing, causing it to free-flow. > In that particular case the water temperature was -0.6 degrees C, and > the regulator had been used on a previous dive, and had water in the > 2nd stage. I don't remember anybody ever complaining about excessive > ice formation in the 2nd stage, or getting ice chunks in their mouths. > ************ > > Tom Wylie wrote: > > I have never seen one freeze, and I have seen a lot of valves freeze cause > I dive a rather infamous N.Wales quarry a lot. > any doubts, just put the environmental cap on the 1st stage filled with vodka > or other appropiate substance. In the last few weeks I have seen a number of people suffering free-flow problems in the quarries in the UK. One of these was a Poseidon Jetstream which froze up at -40mfw in Dorothea where the temp was 6 degrees C. Another happened in the same site a third in Caperwrey (7degrees C) and a fourth in Hodge Close Quarry (4degrees C). Although only one of these incidents was a poseidon it is interesting to note such a large number seen by one person in three weeks!! When I spoke to all four divers I discovered that no-one had used any form of environmental protection - cap or otherwise -. Most importantly when asked if they had breathed from the reg BEFORE submerging the first and second stage they looked blank and said "YES". From experience, buddy's of mine, and I have learned that this is crucial. If you submerge the entire reg in the cold water prior to testing it then the chances of freezing are greatly reduced. Does anyone else have any comments on this procedure. It seems to be little known amongst the diver's I have met at these revolting quarries. Dr Ali Lawrie, aml@li*.ac*.uk*
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