Howdy all, I've been scouring the web and been unable to find the solution to my problem. I'm using an EdgeStar KC2000 and have been for a few months now with several different kegs and have had no problems. However, I bought a keg of Fuller's ESB a couple weeks ago and I have been having issues since the day I brought it home. The retailer sold me an older MicroMatic G coupler to go with the keg, but it had a faulty check valve on the gas line so the CO2 tank drained completely. After that I bought a new G coupler online, but it wasn't forming a good seal with the keg and poured straight foam. This newest coupler was wokring fine for about a week and now I am consistently getting all foam after an initial sputter. Specs: Temperature: 38 degrees Pressure: 8 psi Beer line is refrigerated Lines, faucet, and coupler are clean 3 1/2 feet of 3/16" Bevlex tubing Tower is about 2 feet above the keg The beer foams in the line I would appreciate any advice or suggestions.