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My first 2 sm rigs were dual bladder. I had the hose secured behind the wing bungees and would have orally inflated if I had ever needed it but didn't. I've been diving with someone who had a bladder fail while in a wetsuit so the backup definitely came into play.
Back when I dived in the UK, I started out with a Custom Divers TDB with dual bladder. I routed my drysuit inflator from the right, coming under my arm (horizontal). The redundant inflator was attached to that drysuit hose - meaning I could easily switch that hose from drysuit to back-up bladder if I wanted to.
A few times I've borrowed dual-bladder wings when diving wetsuit in the tropics. I've just attached a small boltsnap to the redundant LPI and clipped it down along the inside of the wing. Very inconspicuous, but easy to deploy and orally inflate if necessary. I'm currently doing some testing on a new model of dual-bladder wing for a scuba manufacturer - will be using this method for that also.
Are typical dual bladder wings completely independent? Or is it one bladder that is just separated by an inner chamber? My question, is just wondering how likely is it for a bladder failure to only impact one half of a double bladder?
This topic of "how to rig" is very helpful as I decide whether to upgrade to a double wing, or just hold out for a drysuit.
I believe they are 2 seperate bladders but I could be wrong. The reason I had dual bladders was due to me diving a wetsuit but I'd hold out for the drysuit imo. You can find a great deal on a used one.
I dive dual bladder wings a lot since I often dive without a dry or wet suit. Most often, I use my left inflator as primary and bungee the right inflator along the side. I only have to pop the bungee off to access the inflator and it's never, ever plugged in.
On my Nomad LTZ, the right inflator is the primary one, and both are bungeed to D-rings on the chest. I only attach a hose to the right side.
they're almost always independent bladders. The exception to that is the Razor sidemount wing which is a 3 layer sandwich where you inflate orally from one side, and normally from the other. Bit strange design choice from Steve, but it is what it is.
All I have seen and use are one wing shell with two inner bladder the are independent but can't be inflate at the same time, because capacity of the wing is only one, most of them can take the bladder out for repair, I own a Razor wing the inside bladder wall of the two bladder are the same.
When diving dual bladder wings I remove all bungee cords, cut off any tabs the bungees ran through, and use a lighter on them to singe the nylon. I replace standard hoses with custom length hoses to shorten them so I have just enough corrugated hose to reach my mouth. I use my Halcyon argon strap to contain the right side back-up inflator. I plug the LP auto inflation hose into the left side corrugated inflator hose. Before a dive I fully inflate the left side bladder and use the fully expanded bladder to push any additional gas out of the right side bladder out of the wing. The wing is so minimal I've been diving with DIR divers who never noticed until I mentioned it.
I run right side long hose primary reg. Left side back-up regulator. Right side LP wing inflator. Left side SPG with both single and dual bladder wings.
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