And I was at the LHBS (such great guys!) this afternoon to pick up new 3/16" ID beer line. Mine was 5.5 years old and even though I cleaned them on occasion they have become quite stained. Furthermore I feel that there is bio-film in the lines that is bringing some "house flavor" to the party.
Better to replace- no?
Anyway, their guy advised me to use 10' of the beer line to increase resistance to reduce foaming. Mine are less than 4' and never had a problem with foaming unless the beer is overcarbonated for my system settings. I didn't agree but kept that to myself...
I've gone with this equation: L= (P-(H*0.5)-1)/R
or (11.8-(2'*0.5)-1)/2.7=L (L=3.63')
Now if I wanted to start serving Hefeweizens or Belgian style brews the length should be at least 7.5'!
The equation had me wondering about transfers and potential loss of precious carbonation.