I'm a new diver, my regs are Oceanic FDX first stage and Delta 4.1 second stage. The 4.1 has a pre-dive/dive selector lever and an adjustment knob for inhalation effort. When I breathe in, as soon as the reg "cracks" it feels like there is positive pressure pushing the air into my lungs as opposed to me inhaling the air. This positive pressure causes air to bubble out my nose, which eventually allows water in to mask that I have to clear. It's more an annoyance than anything, I just want to find out if maybe there's a simple solution I'm overlooking.
I can't tell a difference between pre-dive and dive when I switch back and forth underwater. The adjustment knob increases the effort it takes to initially "crack" the reg, but once it opens the air is pushed into my face.
If I concentrate on it I can reduce and sometimes eliminate the amount of air that comes through my nose, but if I'm just breathing normally it's very annoying.
I can't tell a difference between pre-dive and dive when I switch back and forth underwater. The adjustment knob increases the effort it takes to initially "crack" the reg, but once it opens the air is pushed into my face.
If I concentrate on it I can reduce and sometimes eliminate the amount of air that comes through my nose, but if I'm just breathing normally it's very annoying.