What is Beer Trunkline?

Beer trunkline, sometimes called a python, is the beer conduit in your draft beer dispensing system. It moves your beer from the keg to the faucet, bringing glycol along for the ride to ensure your beer stays cold.

Components of a Trunkline

Beer Lines – The beer tubes include a 3/8” barrier tube that prevents flavor contamination from the glycol lines. In our trunkline, they are numbered, so you can easily identify what beer is moving through which tube. Available with an inner diameter of either 3/8” or 5/16”.

Depending on the amount of beer you are dispensing, you can choose from trunkline with 4, 6, 8, 10, or 12 beer lines.

Glycol Lines – The glycol lines move the glycol alongside the beer lines. The glycol is cooled beforehand in a glycol chiller, and is meant to keep the beer cold on its way to the faucet. Glycol lines are typically color-coded so you can easily tell them apart from beer lines.

The amount of glycol lines does not match the amount of beer lines. Four, six, and eight product trunk lines have two glycol lines, while the ten and twelve product trunk lines have four glycol lines.

Foil Wrap – This wrap helps to direct the transfer of cold from the glycol lines to the beer lines.

Insulation – The soft foam beer case insulation helps to maintain the temperature of the beer.

Moisture Barrier Wrap – This layer is hermetically sealed to prevent condensation from forming in the insulation.

Outside Barrier Jacket – This final layer protects the insulation and is smooth for easier movement.

For more information on how long draw beer systems work, check out the complete story at How beer gets from a keg to my belly…A long draw story.