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From: "David E. Smith" <davidesmith@al*.wp*.ed*>
To: "'Patrick Shaw'" <pat_shaw@te*.ne*>, <>
Subject: RE: First Stage DIN O-Rings
Date: Wed, 13 Aug 2003 20:49:13 -0400
I recall that Poseidon has a different DIN O-ring size than most
others.  I have used what I believe to be the "standard" DIN o-ring
size and it was functional, but "popped" out a lot.  So, I guess there
is SOME truth, but seems pretty week to me.

I don't have any Poseidon regulators anymore.  


-----Original Message-----
From: Patrick Shaw [mailto:pat_shaw@te*.ne*] 
Sent: Wednesday, August 13, 2003 6:29 PM
Subject: First Stage DIN O-Rings

Apologies for sending such a pedestrian message, but the list has been 
slow for a while.....

So, I saunter into the local dive shop that has more than the token bit 
of "tech" equipment looking for a few first-stage DIN O-rings. You know 
the ones...the O-ring on the exposed face of the fitting. The service 
guy goes through his collection of O-rings, assures me that he hasn't 
any, but also assures me that different manufacturers use different DIN 
O-rings. Now, I only use a few brands of regs with DIN fittings 
(Poseidon and Sherwood), but I did find it hard to believe that this 
could be true. Of course, I usually hold service techs in the highest 
regard, but this smacked of a trace of BS. Anyone out there know the

Thanks - Pat Shaw

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