Raystafarian
Registered
There's a lot of talk about rapid exhaust ports (pull dump), but I can't actually find any examples of inflator assemblies that have it vs assemblies that don't have it (elbow).
Can I visually identify a pull dump on the inflator assembly?
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Tom_Ivan
Contributor
It’s not on your inflator assembly, it’s on your bladder. Round plastic thing with a piece of string with a ball tied to the end. You pull the string to dump the air. You’ll definitely have one.
Tom you missed the point. The pull dump mentioned is a string operated valve within the inflator corrugated hose, not a shoulder/butt dump valve. I know the Aqualung/seaquest has it. The valve/string is entirely internal and no external indicators that it is a pull dump style inflator. So I don’t think you will find many with a visual indicator.
EireDiver606
Contributor
Pull dumps are notoriously dangerous for various reasons.
Stay away from them.
Stay away from them.
I think you're talking about the ones that have a cable running through the inflator hose so when you pull on the hose it dumps.
There is no way to tell if they work or not, or even if they have one. Most BCD's have one these days but you can never tell if the cable is intact or even if it is attached or not. Pulling on the inflator is a good way to separate the inflator from the BCD, which will cause the BCD to be unable to hold air.
I've seen failures of these things before, even during dives. In one case a diver pulled his inflator dump along a wall with a bottom depth of +/- 180m where it happened. He had the sense to dump his weights and return to the surface but it could have just as easily cost him his life.
That's not the only incident I've seen but it's the one that made me decide that will no longer teach to use it. I inform students that their vest has this function but tell them that it should NOT have this function and they should NOT use it.
R..
There is no way to tell if they work or not, or even if they have one. Most BCD's have one these days but you can never tell if the cable is intact or even if it is attached or not. Pulling on the inflator is a good way to separate the inflator from the BCD, which will cause the BCD to be unable to hold air.
I've seen failures of these things before, even during dives. In one case a diver pulled his inflator dump along a wall with a bottom depth of +/- 180m where it happened. He had the sense to dump his weights and return to the surface but it could have just as easily cost him his life.
That's not the only incident I've seen but it's the one that made me decide that will no longer teach to use it. I inform students that their vest has this function but tell them that it should NOT have this function and they should NOT use it.
R..
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Zeagle's have one but there's not a way to visually confirm it that I know of. You can feel it if you pull on the inflator (not the hose)
If the Zeagle has a hard elbow instead - it's not one.
The cable wraps around a little pin centered in the top of the inlfator - which is covered by the hose end and cable ties.
If the Zeagle has a hard elbow instead - it's not one.
The cable wraps around a little pin centered in the top of the inlfator - which is covered by the hose end and cable ties.
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My OMS wing has one, I am a little embarassed that up until a week ago I didn't even know it was there, just happened to be reading a different thread about them and went and checked mine by orally inflating and pulling on inflator. Never had need for it so far, don't plan on using it.
Rred
Contributor
"Pull dumps are notoriously dangerous"
How did we all survive the 80's, when they were pretty much the standard and shipped on everything except the old horseshoe collars?
I still dive with that old gear, it has never "dumped" by itself, of failed to dump on command. My only complaint was that the normal manual dump "button" on the mouthpiece end of things can get pushed by accident. Adding a sleeve to protect that made that problem impossible long ago.
How did we all survive the 80's, when they were pretty much the standard and shipped on everything except the old horseshoe collars?
I still dive with that old gear, it has never "dumped" by itself, of failed to dump on command. My only complaint was that the normal manual dump "button" on the mouthpiece end of things can get pushed by accident. Adding a sleeve to protect that made that problem impossible long ago.
Scubapro pull dumps have a little plastic indicator with an arrowhead up on the bcd connection at the shoulder. When you pull the dump, the little plastic indicator rises up and the arrow moves in the direction of the arrowhead. You can actually also dump by pushing on the arrowhead indicator itself.
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