Exg Inflation Gas selector?

[211ratsbud]

my preference for this type of diving is to put a second 3l on the back and use that for suit/wing inflation gas. This makes the rig symmetrical opposite of the O2 bottle and means you free up the space of the small inflation bottle. I have my rack mounted Meg configured this way and many will configure the CCR Liberty-Heavy configuration with the second large bottle as well.

I have a 4 bottle set up. left rear suit bottle does wing and suit, with a wing inflator bungeed in from the right post.

I'm not planning to buy the part mentioned but I was curious about more info and cost etc.

 

[rjack321]

10/70 is expensive?

I will eat the $4 or even $10 cost of "wasting dil helium in my wing" to have redundant buoyancy which is a tech diving 101 super basic fundamental.

 

[SpeedyJ]

I will eat the $4 or even $10 cost of "wasting dil helium in my wing" to have redundant buoyancy which is a tech diving 101 super basic fundamental.

Wouldn't this be adding redundancy to the wing? In the event of a right post shut down, he'd still have both his wing and his suit.

 

[tbone1004]

Wouldn't this be adding redundancy to the wing? In the event of a right post shut down, he'd still have both his wing and his suit.

yes but at the cost of an inherently unreliable part being that it has a bunch of extra dynamic o-rings on the schrader valve and the shuttle mechanism to switch sides. On my rack I have the 3L that feeds wing and dil primarily and then I have the "standard" wing hose coming from the left post that stays disconnected. Basically what he's doing with the block except I have to unplug/reconnect. I'm not all that concerned about it being that much of an emergency though to swap inflation sources but personal preference. He may be doing a lot of different diving than I'm doing that the risk of taking the 30 seconds to unplug/reconnect could be catastrophic.

 

[flymolo]

Graham makes those.

Pumping backgas from a set of LP50s into your wing adds up to a nontrivial amount of gas over the course of a few dives.

The switch lock makes it easy to switch to inflating via backgas if you needed to in a pinch. Otherwise people just leave the backgas hose dangling near the inflator so they can unplug the other hose and plug it in

 

[ChrisMBC]

I will eat the $4 or even $10 cost of "wasting dil helium in my wing" to have redundant buoyancy which is a tech diving 101 super basic fundamental.

Oh, I 100% agree. I think that’s the justification for using the splitter.

 

[211ratsbud]

yes but at the cost of an inherently unreliable part being that it has a bunch of extra dynamic o-rings on the schrader valve and the shuttle mechanism to switch sides. On my rack I have the 3L that feeds wing and dil primarily and then I have the "standard" wing hose coming from the left post that stays disconnected. Basically what he's doing with the block except I have to unplug/reconnect. I'm not all that concerned about it being that much of an emergency though to swap inflation sources but personal preference. He may be doing a lot of different diving than I'm doing that the risk of taking the 30 seconds to unplug/reconnect could be catastrophic.

I'm not doing anything special just asking questions and discovering others crap .

 

[rjack321]

Graham makes those.

Pumping backgas from a set of LP50s into your wing adds up to a nontrivial amount of gas over the course of a few dives.

The switch lock makes it easy to switch to inflating via backgas if you needed to in a pinch. Otherwise people just leave the backgas hose dangling near the inflator so they can unplug the other hose and plug it in

Define "non-trivial"

My rough estimate is that about 50% of my dil usage is in the wing and the rest is into the loop. So ~4cf on a typical 200ft dive. That's 15/55 dil so ~2.5cf of actual helium. $2 usd per dive for the wing to have redundant buoyancy and not having to fuss with multiple whips if I have a failure in extermis

 

[211ratsbud]

Define "non-trivial"

My rough estimate is that about 50% of my dil usage is in the wing and the rest is into the loop. So ~4cf on a typical 200ft dive. That's 15/55 dil so ~2.5cf of actual helium. $2 usd per dive for the wing to have redundant buoyancy and not having to fuss with multiple whips if I have a failure in extermis

It's not that this is new information to me, it's that with a little extra perspective I can totally appreciate the simplicity.

Thx!