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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.
***********************

> > 
> > 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 vodk
> > or other appropiate substance.
*********************
Dr Ali Lawrie wrote:
> 
> 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.
> 
Here in Massachusetts the club to which I belong conducts an ice dive in one of 
the Quincy quarries each year.  Before I moved to Massachusetts I lived in
Troy, 
New York and made many ice dives in the local lakes.  My experience has been
that 
when the air temperature is below freezing, breathing through almost any 
regulator before becoming completely submerged is an almost certain way of
making 
it ice up and free flow.  When the air is below 20 deg F, a regulator is good
for 
a single submersion and then must be thawed and completely dried before it can
be 
used again. 

Regards, 
Bruce Gerhard

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