foaming
Moderator: slothrob
5 posts
• Page 1 of 1
tubing length and foam
If it's actually 1/4" tubing, you need a longer run.
You can use this formula to calculate the length of tubing to use:
Length = (Pressure  (Height of tap from center of keg x 0.5)  1) / Resistance
Resistance is about 0.7 psi/ft (0.40.85) for 1/4" i.d. and 1.82.7 for 3/16" i.d. plastic tubing.
If your tap is ~ 2 feet above the keg, for 10 psi you should need 1225 feet of 1/4" tubing. For 3/16" tubing you should need 46 feet of line. No one ever seems to need the low end of those lengths and they sometimes need longer than the top end.
It's often suggested that you start with the longest suggested length of line required for your serving pressure, some even add 5 psi to their serving pressure for making the calculation. You can then trim if the beer is running too slow. The flow rate should be ~100140 ounces per minute, so it should take 810 seconds to fill a pint.
You can use this formula to calculate the length of tubing to use:
Length = (Pressure  (Height of tap from center of keg x 0.5)  1) / Resistance
Resistance is about 0.7 psi/ft (0.40.85) for 1/4" i.d. and 1.82.7 for 3/16" i.d. plastic tubing.
If your tap is ~ 2 feet above the keg, for 10 psi you should need 1225 feet of 1/4" tubing. For 3/16" tubing you should need 46 feet of line. No one ever seems to need the low end of those lengths and they sometimes need longer than the top end.
It's often suggested that you start with the longest suggested length of line required for your serving pressure, some even add 5 psi to their serving pressure for making the calculation. You can then trim if the beer is running too slow. The flow rate should be ~100140 ounces per minute, so it should take 810 seconds to fill a pint.
BTP v2.0.* Windows XP

slothrob  Moderator
 Posts: 1834
 Joined: Mon Apr 10, 2006 1:36 pm
 Location: Greater Boston
5 posts
• Page 1 of 1
Who is online
Users browsing this forum: Majestic12 [Bot] and 6 guests