So I kegged my Gratzer earlier this week and carbed to the recommended 3.6 volumes, which gives me a head pressure of about 24psi. I ordered a 3/16 polyethylene draft line that is 11' long, the manufacturer lists line resistance as 2.2psi/ft. I'm dispensing with a cobra tap that stays in the fridge. The equation I am using for calculating draft line length is as follows:
Length = keg pressure (24) -1 (apparently cobra taps create about 1psi of resistance) / line resistance (2.2 psi/ft). There is no elevation to take into account. So, the equation should be
Length = (24 - 1)/2.2 = 10.45.
I cut my line to 10.5', I am using a ball lock, 1/4" flared fitting and just crammed the line over it. The line is coiled up into a roughly 1' circle, and is sitting more of less on top of the keg.
All seems well on paper, but the beer shoots out of the draft line like a fire hydrant! Did I miss something? This will be the first time I've tried kegging a highly carbonated beer so I'm a bit lost. Does anyone else have experience with this?