Quote: (Originally Posted by Beanie)
thats what I though out of nose used but out of mouth dumps fresh gas
please feel free to correct if I'm talking BS
If the gas was injected by Solenoid, on Kato you will be dumping O2 rich gas if you dump from the mouth.
If the gas was injected manually then you will be dumping O2 rich gas if you then dump from the counterlung dump.
All above is correct assuming you are dumping within a breath of injection.
Bear in mind that the solenoid opens for long periods on ascent, so on the Inspiration the c/l dump is more effective.
I generally use a combination of both methods of dumping, I never dive with less than 200 bar O2 so am not too worried, however I do manually control my setpoint so it is rare for my solenoid to fire.
Also on the Meg the manual O2 injector is on the inhale side and the dump is on the exhale side, so I'm damned either way.
Cheers,
Dave