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In message "Back mounts and manifolds (was:Re: regulator hoses)", 'N.A.Harman@sw*.ac*.uk*' writes: > > When wearing back mounted cylinders, I also have to undo straps. What puts > me off a manifold is not that I can't reach, but that a clock starts > running when it starts to All Go Horribly Wrong. You have to turn off the > offending valve reasonably quickly, or loose so much gas that you're unable > to make it to safety. I know we're not talking about instantly loosing all > your air here, but even so, it is a worry, at least for me. With > independents, if the worst comes to the worst you can just ignore it. It's > likely to trash the vis, but then vis is an unfamiliar concept to me anyway > :-) Is the extra task loading of switching regulators that big a deal? > I've never thought so... > Be careful, > Neal This is only valid if you switch regs every 5 minutes so that your independent tanks have equal amounts of air in them. If you breathe one down first, switch to the other and then have a second or first stage fail, you are left with a near empty tank and a rapidly emptying tank. I use a dual port manifold. I have my 'regular' reg and octopus with 7' hose on one port, and a second first and second stage on the other port. A failure on either first/second stage pair and I reach back and turn it off, still leaving me with access to my remaining air. The issue of whether you can reach behind you to turn it off, or you have to slip off your gear to turn it off is a side issue, which ever way you choose, practise it so that you are ready and able to do it when the time comes! Doug ----------------------------------------------------------------------------- Douglas G. Stetner | A.C.U.C. | (042) 24-2855 (work) Senior Unix Support Eng. | Dive Master #1018 | (042) 24-2801 (FAX) stetner@bn*.ca* | Wreck Penetration #063 | (042) 85-4379 (home) My opinions are my own. | Adv. Scuba Rescue #054 | Wollongong, Australia
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