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In a previous message, George Irvine wrote:
>  Maybe some of these officious dive shop nitrox wizzards out to go look for 
> themselves, and make sure these tanks and such are all oxygen cleaned and
have 
> viton o-rings and other strokery . I would love to see the guys at TriGas
laugh 
> one of these bozos off the loading dock. -G
> 

George;
I really have to question you on this one. I have heard you mention several
times that there is no need to O2 clean tanks or regs, or use viton o-rings.

I can prove that 100% O2 will eat normal rubber O-rings over time, however,
I don't have any equation for calculating how much time would be required
for a normal O-ring to deteriorate to the point that it would cause a failure.

Since you don't use special (viton) o-rings, how often do you replace the
O-rings in your tanks and regs?
-- 
Regards,
Andy W. Barclay.        andy@le*.ca*
UNIX Instructor Team Leader / Queensview Branch Manager
(pgp publickey avail at ftp.learnix.ca:/pub/pgp.publickeys.pgp)

I regret to say that we of the FBI are powerless to act
in cases of oral-genital intimacy, unless it has in
some way obstructed interstate commerce.
   -- J. EDGAR HOOVER

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