Quote:
Originally Posted by redza
sticky if you can
iif you dont have a check valve,
you can make your own.
using smaller bottles

as the water goes backward into your co2 bottles, it enters the smaller bottle instead of messing up the co2 stuff. and most of the times, the mixture will bubble up and get into the tank. but this mechanisme has stopped stuff from getting into my tank. its best if you tape them together.
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I don't know if you wrote that or not but I don't think that is entirely true. I think it is used more as a gas separator and/or poor man's bubble counter. Most people use it so the yeast mixture doesn't flow into the tank. I don't think it's a substitute for a check valve. Every CO2 setup, DIY or pressurized, should have a check valve(s).