I am NOT a draught beer expert, so I am hoping to learn something here since I do own a draught unit.
With 3/6" diameter line providing 3 pounds of resistance per foot, a 9 foot line would provide 27 pounds of resistance. Unless you have a reason for putting that type of pressure on your CO2 cannister, what is the point of using that much line? I would assume that if you are running your CO2 at a lower level, at some point your beer would go flat and not push through the full line.
I am trying to understand the draught balancing process, so looking for the rationale. Not trying to critique.
Here is the info that I was researching from Beersmith
Ideal Beer Line Length Equation (L)
L = (keg_pressure – 1 psi) / Resistance
Resistance by Type of Line:
3/16″ ID vinyl tubing = 3 psi/ft
1/4″ ID vinyl tubing = 0.85 psi/ft
3/16″ ID Polyethylene tubing = 2.2 psi/ft
1/4″ ID Polyethylene tubing = 0.5 psi/ft
3/8″ OD Stainless tubing = 0.2 psi/ft
5/16″ OD Stainless tubing = 0.5 psi/ft
1/4″ OD Stainless tubing = 2 psi/ft
Thanks