Foamy Beer

Unless it was a partial blockage?

 

I've had this effectively increase the carbonation many times. I place my DH hops in a bag, suspend in a keg (that has not been carbonated), and periodically pulling the PRV ring releases quite a bit of gas. I always have some particulate hop debris that escapes the bag and is evident in the first runnings (it settles down after several pours).

If you have the same pressure on the three kegs you know they are carb'ed identically. It's unlikely the post is the culprit . . . to narrow it down, pull your hop bag and see what happens (I predict no change until the hop debris clears and it all equalizes again). If you need to keep the hops in the keg, just reduce your headspace pressure till it pours correctly.

 

Pulling your dip tube is easy (my guess is you'll only need to nudge it) . . . there ain't nuthin' else in the keg for the bag to snag. Just remember your soda-jerk experience . . .

If you siphon to another keg, do a closed transfer. Take a short beverage line (jumper) with swivel nuts on each end with liquid quick disconnects. Then transfer from liquid post (out keg) to liquid post (receiving keg), burp it, and you'll be oxygen free. I use this technique in lieu of pulling the hop bag. Use something like 6 psi for the transfer.

 

If your hop bag is clogging your dip tube, you didn't suspend the hop bag effectively...root cause. I've had this happen on a rare occasion when I've been drinking too much