Beer Forum

Just filtered for the first time the other day. It is an IPA that started at 1.070 and finished at 1.014.

It was in the carboy for 2 weeks at 68F.

Transferred to a keg and dryhopped for 10 days at 40F with just enough CO2 pressure to seal the lid, then removed it from the gas.

I filtered it last weekend moving it to another keg at 10-12 psi (filtering took about 30 minutes) and then connected the new receiving keg to my manifold.

Does the process of filtering create additional turbidity? And if so, will this go away in time? This is the first beer I have that spits out a lot of foam as I pour it - the pressure, temperature and length of serving line is the same as before. I also notice quite a bit of gas in this particular serving line, the other lines have bubbles now and then, but are pretty much full of beer.

If it makes sense, it seems that much of the foam I have is on top of the beer, not as much inside the beer. It has only been on the gas for 4 days and since I do not shake it usually takes a week or so before I'm fully carbonated. Curious if the foam will drop back in the beer and if there is something else I can do in the filtering process to reduce this. Previously (without filtering) I would have beer that would slowly gain in carbonation as the first week went on, and none of this immediate gassiness.

You might have something else going on, such as dirty lines and/or faucet.... I would assume it is more likely a regular ol' draft issue as apposed to filtering causing excess foaming... but we'll wait and see what other people have to chim in w/.

Wow. that post was worth about .0001¢

I filled up the line with PWD and let it sit for a couple hours, then flushed it with Star-San before connecting to the new keg. Never took apart the faucet - maybe i'll disconnect and clean that out. Thanks. All my taps have worked fine before - just a little plastic taste that went away after the first few pints moved through the fresh line.

For good measure I just removed the line and flushed it with a few gallons of hot water to remove any residue and filled up with beer again. Still bubbly - but I'll wait and see what happens as I don't think the beer has absorbed all the co2 it can as of yet - maybe that is what I'm seeing? As you point out, the filtering might not be related at all.

If all the parts (keg, lines, faucet) are cold and the beer is still undercarbonated and you are getting foam in the lines then you have a leaking o-ring somewhere. The beverage post on the keg might be loose, or the dip tube o-ring under that post is missing or damaged, or possibly the ring on the outside of the post is damaged. If that external post ring was messed up, though, you would see beer leaking.

I would pressure-rack (so you don't lose carbonation) to a different clean keg and see if the problem goes away. Then tear down the problem keg and find/fix the problem.

+1 to what Danny said. I suspect a bad o-ring on your liquid disconnect. Undercarbonated beer should not foam excessively unless there is a small leak, dirty lines, or a burr in the faucet.

PBW is OK for cleaning lines, but B-L-C is better (stronger, more dangerous).


Mylo

Yep - you all were correct. I just moved everything over to a new keg and all is now working fine.

Didn't notice any leaks in the bad keg, but something funky is going on inside as changing the outside post o-rings did not help at all. Both post were tightened down completely, but will check those inside o rings.