The fourth keg that I've done is giving me a foamy pour. It results in about 1/3 beer and 2/3 foam in the glass. I've been looking around for advice on how to deal with it, but it nothing seems to make it any better. My first 3 kegs are all great. I may have left this keg at 30 psi for 3 days instead of 2 like I did the other ones. I have a new theory that I want to ask if anyone has seen. Suppose that there's a pinhole leak at the top of the beverage dip tube. This could be either a physical hole through the tube, a crack in the flange at the top of the tube, a faulty o-ring around that dip tube, a gouge in the seat where the tube sits, or something similar. I can visualize where this could cause gas in the headspace to mix with beer as it's being dispensed. If this theory were the case, I believe it wouldn't matter if the beer had no carbonation. It would still come out foamy due to the "injection" of CO2. Has anyone of heard of foamy beer being caused by such a thing? I'm wondering if it's worth depressurizing the keg and taking the liquid side apart to inspect and test it. I'm also considering racking this beer into another keg to see if it behaves any better. Then I could fill the keg in question with water to see if it mixes with CO2 as it's being dispensed. I don't want to disturb my batch any more than necessary.