Welcome to the Cave Diver's Forum.
"With regard to cave diving, the great thing is to be carried where you could not have imagined you would ever be, and then to come back alive."
"Wilderness. The word itself is music." Abbey, Desert Solitaire
Best reply yet !!!!!!!!!!!!!!!!!!! No argument from me.:arrowed You nailed it Wingman.
Lmao... when's the next camp out? Gotta work this week or is be at Ginnie
I like it. You havent been here too long and you're already apologizing for jumping on someone.Originally Posted by FreeDiver
I'm not sure how you'll do in your courses but between this and the past 20-odd pages I think you'll earn your Abe Davis in internet diving in record time.
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With regards to the OPV thing, I personally pre check every dive. AND I have pulled the OPV *completely* off the wing mid-dive (cave). I would also note it was not a Greek tragedy, I was using a horseshoe wing and just parked more gas on the other side. Was also diving dry so had that as a backup. NBD.
You are correct and it's not such a big deal in backmount. Just a minor modification of the trim, or listing to the left, will prevent most of the gas from escaping.
In sidemount this can be much more difficult as the over the shoulder inflate/deflate is rarely used and the dump valve will usually sit in a much more exposed position.
Most SM rigs are designed in such a way that gas can be dumped while in perfect trim, which is convenient and also very helpful in small passage.
Removing the dump valve can become a serious issue with these kind of rigs.
Setting up my sidemount system and have a question. Since I'm about to start my training in wetsuit, would I only have one inflator hose to the BC? Seems like an obvious answer, but in my head, I'm thinking about worst case scenario (cat. gas loss to the inflator's tank), and can see where having two inflator hoses would be a benefit. I could very well be misunderstanding this though. What is traditionally done when diving without a drysuit? One inflator on a dedicated side? Two inflators, one tucked, the other to the BC? Or the crazy concept in my mind to have a Y connector with both going to the BC? Ridiculous? Probably. But that's why I'm asking.
Oral inflate
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y connector doesn't work for the same reason the UTD Z-manifold still requires one side to be shut off. If there is any differential in IP and cracking pressure in the first stages, which there always will be, it will be a biased draw from the side with lower cracking pressure.
If diving in a wetsuit, you have two options, one is to put an inflator hose on your other first stage and have it tucked away somewhere, the other is to just orally inflate. A lost power inflator on OC is nothing more than a minor annoyance as you should be plenty comfortable orally inflating your BC. This is emphasized to the point that if a students rental gear has an auto-inflating power inflator due to a bad o-ring, we do not require them to call the dive, they are to complete the dive orally inflating as necessary.
Now, I have inflator hoses on all of my regulators including my O2 bottle. I dive a mix of wet/dry so I am rather lazy when it comes to making unnecessary changes to me gear and prefer for them to all have the ability to inflate. We are also starting to use RescuEAN's and having an inflator on all of the regulators allows any tank to be connected to the pod to administer rescue breathing from a BVM.
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