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Date: Thu, 23 Oct 1997 08:16:52 -0700
To: Shaun Snee <ssnee@ho*.co*>
From: Kevin Connell <kevin@nw*.co*>
Subject: Re: Tanks - Why 104s
Cc: techdiver@aquanaut.com
At 12:36 AM 10/23/97 -0400, ssnee@ho*.co* wrote:
>My understanding was that: as one became more comfortable in the water
>the amount of weight needed would drop due to better breathing patterns
>and control.  I don't see how taking weight from you belt and putting it
>on your back (except for trim purposes) offers any advantage.

That's not the idea.  The idea is to REDUCE.  weight belts are just another 
thing that will kill you.  104's are the correct choice for drysuit diving.
 They work fantastic.  Depending on your light and backplate, you at most
will need a 5lb v-weight.  I dive without a v-weight, with a ss backplate
and an AUL14.  No weight needed, even with empty tanks.  If you're carrying
around 30 lbs of body fat, I would suggest shedding that instead of
carrying a weight belt.  


>Hydro tests measure the plasticity in the walls of the tank.  The
>difference between most hp steel and lp steel tanks is primarily (only)
>in the size of the neck.  LP tanks are rated as such to allow for
>standard (yolk) valves.  HP tanks have a smaller neck; this results in
>less pressure on the threads holding the valve in place.  Overfilling lp
>steel tanks fatigues the threads not walls.

Tell that to Europe.  What a crock.
--------------------------------------------------------------------------
Kevin Connell <kevin@nw*.co*>

Northwest Labor Systems
http://www.nwls.com
Bellingham, WA
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