Re: Thermodynamic rollercoaster...

Outer Bamnks diving on the Great Escape Southern California Live-Aboard Dive Boat

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Posted by Chuck Tribolet on August 20, 2002 at 21:46:56:

In Reply to: Re: Thermodynamic rollercoaster... posted by Kendall Raine on August 20, 2002 at 10:24:26:

Kendall, Karl is a CPA, not an engineer.

Thermodynamics has nothing to do with it. If it
did, your hot water plumbing in your house would
come apart monthly. It cycles from 60-70F to
120-140F and back every time you cycle the hot
water, which will be several times a day on some

Karl does make a good point about O-rings needing
to be lubed before assembly, and this is an area
where dive shops seem to not do their job. The
lube is so the o-ring will slide when things are
assembled instead of bunching up so it leaks. (We
photographers tend to be somewhat anal about this)
The lube needs to be suitable both for the gasses
in question and o-ring material. CristoLube will
be appropriate in many regulator situations.

Cristolube is $19 or $22 per 2 oz (life supply for
most of) from


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