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On Thu, 20 Jul 1995 16:51:07 -0500 you said:
>>Rich uses examples of, say, putting a Y-valve on a tank and attaching two
>>complete regulator systems to the valves.  The complexity has doubled (two
>>regulators) but he asserts that the chances of a life threatening emergency
>>has decreased.

>   True. If one of the regs free-flows (or an O-ring fails), the single air
>supply gets depleted real fast, whereas in an independant doubles, you have
>a real enuinely true authentic reduntant air supply... :)

At the risk of showing my ignorance here (have dealt with manifolds, but have
never seen a Y-valve), doesn't the Y-valve have TWO valves downstream from
the actual Y, rather than a single valve upstream from the Y?  If the latter,
I fail to see any benefit from a Y-valve other than possible regulator freeze
in cold water; sounds more like doubling the risks of a free flow otherwise.
Doesn't the Y-valve at least have some means of shutting off one side of the
output (whether separate valves or a single isolator) ?  Isn't that the
intent?

[\] Jeff Kell <jeff@ut*.ut*.ed*>

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