Something similar, but not all the way down to one-half air pressure. A good friend on my survey team had a sudden and significant oring leak develop at a DIN connection about 1200' penetration into Phantom Cave in west Texas. Max depth had been 68', with the average about 30. I was still outside the cave and I don't know their depth at the time leak developed. It was the oring at the DIN reg to valve connection on one side of her isolation manifold. She started with 3000-3100 psi, but I don't know the remaining pressure at the time of incidence. (probably around 2500) They had been moving slowly taking compass shots and line measurements, so had been in a while longer than would have been necessary to normally get to that point. She was able to shut down the valve in textbook fashion. Her husband was close by all the time to assist if necessary, and they made a safe and easy return to the cave exit.
I was suggesting a long (5' or 7') LP hose for the SH reg on the right post of the manifold (as per "normal" tech setup). You seem to be talking about lengthening the corrugated hose on the right horn of your DH reg by a couple inches to account for the 7 inch offset of the cans to the left. I would think this would be unnecessary, as standard length loop hoses should still reach your mouth easily. Maybe not; I guess I'll find out when I try it. If anything, you could maybe shorten the left side of the loop a little or add a weight to keep it from floating up higher than desired (though this may also not be necessary). I'm going to start by trying it with the standard loop hoses it came with, both for simplicity and ease of switching back and forth between singe and doubles diving without having to change out the loop hoses. We'll see how that goes.tripplec wrote: ↑Fri Dec 28, 2018 4:35 pmThey used to make longer hoses for a DA if I remember right. I have been thinking your same thought. I think I may have even seen a picture somewhere of someone who pieced two hoses together for the outer most hose and used a long hose for the inside. A picture from the black and white days. I imagine the hoses would have to float the same height to keep breathing normal.
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