Don't ask me how it works but it only works for CO2. It's the weirdest thing.
The above shown check valves are OK but I've used them in the past and have had to replace them after 6 to 12 months because they stopped working. The Dennerle I've used now for 4 years continuously and is still working, and appears to be all plastic so no worries about corrosion.
And yeah seriously it only seems to work for CO2, although maybe it's just a question of needing to build up enough pressure in the line (I run my CO2 regulator around 20psi).
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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