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We plug our manifolds as well. O ring failures are not even enough to call a dive on a proper manifold. That is a double barrel ring adjustable like the Sea Elite. When any of the knobs break off, this usually will not cause a leak unless the bonnet o ring goes, and again, not much of a leak. The real failure mode is a double failure: it is when the knob and the reg fail, either by freeflow freezup or by knocking the knob off and then failing the reg in any fashion. That is the only failure that requires isolation. We run low IP's to prevent the freezups, we run DIN regs to reduce the risk of breakoffs ( and in some cases replace the DIN connectors with stainless steel ones ), and we rig the regulators so that all of these contingencies including roll off break off of a knob are taken into consideration . See my article on this on the WKPP web site. ----- Original Message ----- From: "Jiri Stetina" <jstetina@ne*.cz*> To: <techdiver@aquanaut.com> Sent: Wednesday, April 18, 2001 11:25 AM Subject: RE: Isolating Manifold Question > The reasons for diving with open ISO are clear. Imagine manifold withouth > burst disks - European manifold. Which situation could be solved by > closing isolation valve? Leaking o-ring can be solved by closing the tank > valve. The leaking ISO istself? Manifold o-ring failures? > > Do you have any experience that needs closing the isolation valve during > the dive? > > Jiri Stetina > > > -- > Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. > Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. > -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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