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I have been giving the following question some thought.... On a dual manifold with isolator valve. The tankpressure will always be = on the cross-over bar, no matter which valve is being closed. What will = happen in the event of a malfunction of the isolator valve that results = in a leak or fast gas loss. As I can see it, all gas will more ore less = rapidly, be lost and there is nothing that can be done to prevent it. Personally I=B4m using independent doubles instead of the dual manifold. = This will of course give an extra number of regulator switches and some = added gas management. But on the other hand you will not have to isolate = any valve in the case of a freeflow, certainly you will the loose the = "side" that malfunctions, but it can never effect the other, hopefully = still working bottle. In combination with the thirds rule and = equalization (through regulator changes), I feel this is a very safe = system. I know that a large number of very experienced divers are = relying on the dual-manifol. So my question is, how is this problem = being addressed and secondly have anyone had a malfunction as described = above. Regards, Lars
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