On Wed, 16 Oct 1996, Mike Severns wrote:

> 
> Where is the O-ring in your canister? I can't seem to find one.
> 

Mike, there should be an O-ring around the inside of the top lid of the
scrubber cannister so that when you have filled the cannister with
scrubber using whatever technique, the top fits snuggly onto the
scrubber-filled- cannister so scrubber doesn't fall out and so that gas
flow through the scrubber is axial from bottom to top and none leaks out
the side where the top lips over the side- though I don't see why that
would make any difference. In reality, the O-ring may be to hold the
absorbent-cover disc (#B24D03301) in place when you take the cannister top
off to reload. Refer to the cutaway diagram on page 19 of your CCR155
Manual that came with your unit. Give me your fax number and I can fax you
a copy.

A technique that I learned from Spec. Warfare guys to pack 812 scrubber 
properly so there is no settling, no channeling, nothing but perfect 
packed material. You pack each individual particle of scrubber material 
one-at-a-time, matching each surface so as to get a flush fit. Each 
particle has a perfect surface-matched mate in the bucket of scrubber so 
there is no excuse for manual trimming of a particle to fit. Just be 
patient and find the correct particles that have intelocking sides and 
build the scrubber bed from the bottom up. When I was a beginner I built 
the scrubber bed from the top down- I didn't know any better- by flipping 
the lid upside down and building the outside wall of the scrubber bed up 
first and then filling in the center. That's a real pain. I can now get 
scrubber packed in about a month. The beauty of the technique is that no 
matter how much the boat slams your unit around, you rest comfortably 
knowing that you have a solid block of non-settling, non-channeling 
scubber in your housing- and unloading it is a breeze. You just pick up 
the whole block of scrubber in one piece and set it aside. When you have 
four, you can line them up close together, put the appropriate optics in 
the first and fourth block and you have a telescope.

> >Then the locking screw. I have never experienced channeling. 
> 
> Nor have I.
> 
> >I use the 2.5-5u particle size scrubber so it is big as boulders anyway. I
>worry more about Panama Canaling with that stuff. Rod
> 
> I am using the small grain since it is so expensive to ship it out here I may
as well get my moneys worth.
> 
> Maybe I have been diving too long, but I don't think that I have to be too 
intense about my packing to achieve the desired results. Packing a canister
does allow some individualality. Besides, using the small grains, how would I
know when I am one full grain over the top or just three quarters of a grain?
:-) 
> 
> I am willing to change my technique if you have a good reason to do so, but
for the time being I will plod along with conservative dives as I perfect my
technique. Then I will meet Rich on my way up with great shots of Odontanthias
elizabethae.
> 
> You keep mentioning monitor. Is that a lizard?
> 
> Aloha
> Mike
> 
> 
> --
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