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[APD] Re: Backflow into CO2 systems

I just use a cheap airline check valve between my CO2 tank and bubble counter. If it ever gets water in it (which it hasn't yet) I know that it's cactus due to carbonic acid formation, but I figure it's only a couple of bucks to just put on a new one if need be.

BTW - The check valve can be seen just above the bubble counter in this picture:
Sorry Tom, I haven't got around to posting it up on anymore internet sites as yet! ;)

Clint Brearley
Melbourne, Australia

> Brown, Diane at Brown_D at kids_wustl.edu wrote:
> > The problem:  when my CO2 tank runs out, water backs up in the 
> system,> sometimes past the needle valves, but never back to the 
> CO2 cylinder. Still,
> > it's a pain in the behind to have to undo connections and blow 
> out the water
> > to get the system going again.
> ... 
> > What can I add to the system to keep the water from backing up?
> I don't use check valves either, but I have a coil of tubing 
> between the
> tank and bubble counter. It gives me a little extra time to notice 
> when the
> CO2 runs out.
> Dan Dixon

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