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Subject: RE: Break-away for pressure gauge?
Date: Thu, 25 Feb 1999 12:47:47 -0500
From: Jim Cobb <cobber@ci*.co*>
To: "David Shimell (shimell)" <shimell@se*.co*>,
     "John Brett" ,
     "Tech Diver"
Damn zip ties @#%$%!@#$%....  ;)

Dave, this is cool technique, thanks for sharing it with us.

   Jim

Sender: David Shimell (shimell)  Date: 2/25/99 3:01 AM

>All
>
>>>As I recall, JJ's method for securing the long hose second stage
>>>involved a tank O-ring and a zip-tie. The tank O-ring is looped
>>>round the hose in a "figure 8", and then zip-tied to the clip. This
>>>gives it a little "stretch", while still allowing it to be broken
>>>free with a good tug.  Is that what you are thinking of?
>
>Alternatively...
>
>Unscrew the pressure gauge from the first stage and fold an O-ring through
>the eye of the swivel bolt snap.  In doing this you have created two loops
>of O-ring.  Pass the pressure gauge hose through the two O-ring loops and
>slide down to the end of the hose near the gauge.  Reconnect hose to first
>stage.  Voila.  A breakaway without the use of a zip tie.  This should also
>keep Jim Cobb happy as he rightly hates zip ties!
>
>BTW, the section of the O-ring needs to be appropriate to break with the
>right amount of force, but not flimsy enough to break when not desired.  I
>found a neck O-ring to be too strong and bought some thinner O-rings of
>1/16" section but the same diameter (sorry, I can't recall the reference for
>these).
>
>Note that this method can be used to secure break away regulator clips also.
>
>John Grogan put out an email a while ago about this, I am merely
>plagiarising.
>
>David Shimell
>Project Manager, Sequent Computer Systems Ltd., Sandton, South Africa.
>Email: shimell@se*.co* <mailto:shimell@se*.co*> 
>
>-----Original Message-----
>From:	John Brett [SMTP:John.Brett@pi*.co*]
>Sent:	Thursday, February 25, 1999 9:36 AM
>To:	techdiver@aquanaut.com
>Subject:	RE: Break-away for pressure gauge?
>
>
>
>> There was something on the list a while back that JJ had devised a way to
>> rig the pressure gauge bolt snap so it could be broken free if needed? 
>
>A guy I know has just come back from training with JJ:
>>>Apparently, JJ was in a
>>>situation where he couldn't get his gauge unclipped and couldn't cut it -
>>>hence the switch
>
>>As I recall, JJ's method for securing the long hose second stage
>>involved a tank O-ring and a zip-tie. The tank O-ring is looped
>>round the hose in a "figure 8", and then zip-tied to the clip. This
>>gives it a little "stretch", while still allowing it to be broken
>>free with a good tug.  Is that what you are thinking of?
>
>The same applies to the SPG.
>
><snip>
>
>>The same method could certainly be used for the SPG, but I'm not sure
>>it's necessary. Under what circumstances would you want an SPG to
>>"break away"?
>
>There's a brief section in the DIR II tape where G talks about breakaway vs
>non-breakaway
>gear. The long hose and SPG come under the breakaway category as having the
>boltsnap break off isn't a disaster (a pain, maybe), and there are cases in
>which you
>may need to get the hose quickly.
>
>John Brett
>
>--
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>


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