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>But more of a probability then manifold failure would be a regulator problem,
>specifically an uncontrollable free flow, which without an isolator would
> drain both tanks. The isolator valve in this situation would allow you of
>course to  isolate the loss of gas to only the cylinder with the free flowing
>reg.  attached to it.
>
>Safe diving,
>
>Raimo.

In such a situation (regulator freeflow), why wouldn't you just shut off the
regulator outlet.  Each regulator can be turned off separately so the gas of
the two cylinders is available for the other regulator.  There is no need to
close the isolator valve.


Michel Therrien
m.therrien@ne*.qc*.ca*

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