I’ll offer a contrasting opinion…
Pulling on your inflator-deflator hose sounds really good until the wire breaks.
BTDT.
I removed the wire, couldn’t find a replacement and then (mistakenly) felt like I was “limping”.
That little Zeagle back inflate wing was a great starter BC but I’d never go back to using a pull-dump wire inside my inflator-deflator hose. Its primary function is too important to risk complication for an additive convenience. One doesn’t need to raise one’s hand above their head for a controlled release of air from their BC. Simply roll a little to the right from neutral trim and this works just fine.
Gotta agree with NotingClever. Pull dump can be nice but it also introduces a failure mode. When the BC's go in for their annual check ups the system is pulled to make sure it works. However from my observation the BC is not worn when this is done but rather one hand is on the inflator and the other hand is at the top on the dump valve. It is pulled and air is dumped. But what does not happen is the connection stress test. If you wear the BC then you can pull the inflator and if that connection is weak due to age it may break it. This should be caught during annual inspection.
So two failure options one more likely than the other
1. wire breaks and you are back to dumping as you were taught in open water
2. tear off the hose at the shoulder connection and all inflation lost.
my two cents
OK, I can understand the theoretical failure mode of the elbow and tugging on it
I would argue though that pulling the hose up over your head probably puts more stress on the elbow
but either way, that seems like a longshot failure mode.
But I'm not understanding the cable thing. That seems extremely unlikely
but even if the cable does brake, the failure mode would be the valve's normally closed state under the spring force....so non-issue
Spring failure, or seat failures are another failure mode, so this falls in line more with the idea that the more OPV's you have in the BC, the more failure point potentials you have... well more than two of them.. because two is one and one is none from a redundancy perspective.
These seem more like arguments why someone doing extended DCL diving would be concerned with
but then maybe I'm misunderstanding what ya'll are getting at with the cable failure.
