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STEVE MERCER writes: To the bloke who posted a question about this. =20 We use winterised Poseidon Odins on a single tank with a Y valve. Our = diving is all directly below the hole on life line and is rarely deeper = than 30 m. I've tried winterised versions of teh Conshelf, Scubapro Mk 10 and = Sherwood Magnum Blizzard but they all failed dramitacally fairly early. ~~~~~~~~~~~~~~~~~~~~~~~~~~~ Hi Steve, I am interested in this one. By "winterise" do you mean putting the rubber cap on the 1st stage with some anti-freeze fluid, or was there more? What water temperatures were you experiencing? Did you have any freeze-up symptoms, or was it not even close? I have heard a couple of tenuous stories about Odins freezing shut, but I have never been able to do this in trials in winter. The coldest water we get is in quarries in winter when it gets down to 4 degC. When you purge the 2nd stage for about 20 seconds, you get solid ice forming inside which locks the pilot pin in tilt, perpetuating a free flow. If the ice did manage to seal the pilot pin shut, this would cause air shut-off, assuming that ice had not formed inside the main outlet holes, jamming the bladder open. Anyone else got any theories? Bill.Dyer@mi*.co*.uk*
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