Question about AquaLung i3 system

[g1138]

When your BC's partially inflated, all the air rises to the highest point of the bladder forming an air bubble. Every part of the BC bladder below that air bubble is shrinked wrapped against itself.

So when you deflate, any dump valve that's at the lowest point will probably be shrinked wrapped against itself, preventing water from siphoning in.

 

[RLima]

I have a dimension i3 and never had issues with water. A certain amount of water gets in, sure, but not much.

I like the simplicity of using just a lever but the i3 seems to make the bcd a little heavier than it should be.

 

[JackD342]

I have a dimension i3 and never had issues with water. A certain amount of water gets in, sure, but not much.

I like the simplicity of using just a lever but the i3 seems to make the bcd a little heavier than it should be.

I don't think it is the i3 making it heavier, I think it is only available on BCD models that tend to be a little heavier due to other design elements. I would think the added mechanisms are offset by the switch from a standard inflator to a lighter inflation tube, so probably close to net neutral weight difference.

 

[jeffsky29]

All air air dump valves on i3, have one way valves that only let air or water out, not in. No magic, very simple one way valves.