Quote: (Originally Posted by
Chris)

Ohh I see what you mean, so you are worried about gas going from the exhale side at the top of the can, through the gap into the top of the scrubber then on to the inside of the head.
How big did you say the gap was ?
Cheers
Chriso
The gap is probably very small. More than a gap it's just that the 2 pieces are not bounded to each other. We can feel some tolerance between the two parts so it looks like gas (i.e CO2) could go thru that margin.
Yann.