Seems as if you have a walk in cooler with the shanks on the wall but the kegs are on another wall away from the shanks and you cannot use 3/16" exclusively with your run length.
At 38 F
beer temp., use 14 PSIG CO2. Determine how long of lines are required to route from the back of the shank along the walls to the keg station. Let us know what this run length is and we can calculate from there. Length will determine if we should use barrier tubing for the trunk or if vinyl will suffice. Please advise.
Scott Zuhse, Instructor
Micro Matic Dispense Institute