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Kent Lind wrote:
> 
> Helen Johnstone wrote:
> >
> > In UK (Europe?), green knobs = Nitrox. Some Nitrox fillers will only
> > fill tanks with Nitrox if they have green knobs.
> 
> > Not sure about elsewhere in the world.
> 
> Sounds like a good system you folks have over there.  So what do you do,
> keep a pocket full of diffent colored valve knobs and swap out your knob
> color depending on what sort of fill you want?  I like it.  Regards, Kent


The US Navy uses color coding on valve handwheels to identify the piping
systems contents - seawater, chillwater, fuel, sewage (we called it CHT
for collection, holding & transfer)

In the Damage Control Central of the ship I was on in So. Carolina we
had a valve color coded and labeled "Potable Water / CHT X-connect" The
DCO wasn't too fond of it, but he let us keep it.

Drew
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