I just did a test run w/ water and there were no leaks but I'm concerned about the amount of oxygenation that occurs even w/ the anti-foam hose attachment that's suppose to be for sparkling wine. I can see how it would do great w/ wine in large bottles. I asked one of my LHBSs and they said it can be used for beer as well since beer bottles are usually smaller and they will fill up quickly. I'm just going to use it on a few bottles during my next bottling session and see what happens.