O2 and demand reg

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O2 and demand reg

Postby Mullins » Mon Dec 15, 2008 9:44 pm

I'd appreciate some advice on how to get hold of 100% O2 in NZ. In Egypt we were able to get regular aluminium tanks that were filled with O2 (they had presumably been scrubbed etc) and used normal regs which let us go back down to 5m for a while after each deep dive. Is it possible to get a similar setup in NZ? We have a small medical kit here but it's only good for a few minutes and can't be used underwater. Not much of a flow either.

This is for freediving by the way, not some weird scuba "I want O2 cos I plan to violate my deco" scenario! Aside from lowering DCS risk the 1.5atm O2 seems to help clear lactic acid so when it's available we use it for recovery even after medium-depth training dives.
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Re: O2 and demand reg

Postby Andy » Mon Dec 15, 2008 9:48 pm

The number of tanks you can fill with O2 in this country is laughably small thanks to some heavy handed legislation!

Global Dive in Auckland (http://www.globaldive.net) sell 3.8 litre tanks that can be filled with O2, which would probably be ideal when combined with an O2 clean (scuba) regulator.
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Re: O2 and demand reg

Postby Mullins » Mon Dec 15, 2008 9:54 pm

Thanks Andy - would those guys be able to do the fills as well, or do they just sell the tanks?
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Re: O2 and demand reg

Postby Andy » Mon Dec 15, 2008 9:59 pm

They've got a Haskell oxygen booster, so can fill to 200 bar (which is nice!). I've got one of those cylinders and I get about 45 mins at 6m out of it with a 200bar fill.

Cylinders are about $400, a simple reg with O2 cleaning is probably about $600.

If you need longer than 45 mins, let me know - I've got the list of tanks that you can get filled with O2 and can try and find a bigger one.

Another option, though it assumes you're training off a boat, is a 5m hose and scuba reg attached to a "bull nose" style first stage that can be fitted to a standard O2 cylinder. Not sure of the exact details of how this is done (try contacting Petemes by private message), but hook one of those babies up to a G cylinder of O2 and you'll be breathing it for months!
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Re: O2 and demand reg

Postby silent solutions » Tue Dec 16, 2008 6:56 am

You can also do a 2 pin medical to 300/200 bar adapter and use a standard o2 clean first stage on what ever length hose form the boat you want. If the g is to large e size are a bit easier to throw around.
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