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>Questions... Am I right in thinking that only the 'Genesis' manifold offers >the redundancy described ? Other manifolds I have seen either... combine >the air in both cylinders to one or two regulators (a free flow results in >all air being lost..!)..or have two seperate cross flow valves, so that >shutting off a free flowing regulator takes that cylinder away from >availability. The valves on a crossover manifold without the isolator valve only shut off the regulators, and therefore all the air is still available if one valve must be shut off due to a regulator free-flow. The isolator valve adds _some_ protection against a blown burst disk and certain types of manifold failure, but a major manifold problem would still lose all the air in both tanks. Personally, I use a crossover manifold without an isolator valve rated at 300 bar. If the Genesis were available here, I'd use it. Some other manufacturers are starting to produce this kind of equipment, but only (as far as I know) for the US market. In the UK independent twins are the norm, and there is probably not the demand here to make the manufacture of this sort of manifold to fit UK cylinders worthwhile. Most divers dive with the isolator valve open, to allow equalisation of the air in the cylinders. Turning the valves on and off just takes a bit of practice (now you know how to pass the time on those long hangs :-) ) Having said all this, I'd certainly be interested to hear from an Brits using the Genesis manifold. Andy Dr Andrew Pitkin apitkin@ad*.de*.co*.uk* apitkin@ci*.co*.co*.uk*
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