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> One more thing: I keep the dump valve with the maximum resistance, and I do
> not overfill the canister. Actually the marker line in the scrubber
> canister is too high, if you put 1 cm/0.4 inches less scrubbing material,
> you get 2 results:
> 
> 1) Decreased breathing resistance (less compression of DraegerSorb) and
> that means less pressure build up in the exale bag, (less gas will be
> dumped overboard)
> 
> 2) Again: less compression of DraegerSorb, which also means less pressure
> stress on the canister itself, the canister will not be deformed at the
> top, and you obtain a better seal, (less leaking!)

Doesn't this also mean that you have a greater probability of incorrectly 
packed absorbent, leading to increased chance of channeling, leading to 
an increased chance of CO2 buildup?  Maybe this doesn't matter as much on 
a semi-closed unit, but on a fully-closed, canister packing has to be 
done carefully and correctly.  Seems to me Draeger probably had a reason to 
put the fill-line wherever they did.

Aloha,
Rich

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