I'm dealing with an issue with one of my draft lines that I've never seen before in all my years of using corny kegs.
When you pour the beer, the first ounce or so is normal*, followed by a gas pocket, followed by a bunch of foam as the line clears. Once the beer pours from the keg itself, it seems to be fine.
- It's a ball lock keg that has been in service for a while.
- CO2 seems to be coming out in solution in the lines. If I pour two pints within a few minutes, the second one doesn't have a gas pocket, but it still does have a good shot of foam.
- This has happened to me on 2 batches in a row, although I did use the same keg and same lines and faucet each time.
- The beer in question is a brett saison, and I do carbonate it highly. I don't think this is simply a situation where CO2 is coming out of solution due to some sort of balancing thing. If I disconnect the line from the keg, the line doesn't foam.
- I've changed out the black liquid disconnect with no difference.
- I've tried a picnic tap with the same results.
- I keep the beer (as all beers) at 45F. I keep this one at 14 PSI, on the high side.
- There don't appear to be any gas leaks and there are definitely no liquid leaks.
Anyone ever see anything like this? I'm going to take apart the keg and replace the seals if I can't figure out the deal before the keg kicks.