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>
> Sean T. Stevenson wrote:
> > > 
> > >2.  Isolator valve on manifold:  Si or No ?
> > 
> > The isolator is necessary.  In overhead environments, the
possibility
> > exists to break off the right post knob, and if after doing so you
have
> > a first stage failure on this post, by closing the isolator you save
> > half your gas (and probably your life).
> > 
> ---Robert Wood <robert_wood@Mi*.CO*> wrote:

> 
> 	How many incidents of broken valve/post/knob have there
> 	been? Are we not trying to solve a non-existant problem?


But the isolator also allows you to save at least half your gas if you
have a free flow or some other failure...it is not always possible to
identify with certainty which side is affected..isolating then closing
the most likely side gives you the best chance of saving as much gas
as you can.
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