How to Choose the Right Beverage Tubing
The wrong tube taints flavor, ruptures under pressure, kinks on a turn, or won't seal at the clamp. Five questions get you to the right line every time — here's how to answer each one, with the products that fit.
The short answer
Five things decide the tube: what's running through it (product, gas, glycol, or hot liquid), temperature, pressure, flexibility, and clamp size. The first one matters most — it sets the material. Everything after it narrows the spec.
For most product lines, that means food-grade barrier tubing like Accuflex Bev-Seal Ultra. For gas, a gas-rated (often reinforced) line. For hot water or coffee, high-temperature silicone. Then you match temperature and pressure ratings, pick the flex your routing needs, and size the clamp to the tube's outside diameter.
The tubing types, at a glance
Start here. The product running through the line points you to a material; the rest of the guide refines it.
| Type | Best for | What sets it apart |
|---|---|---|
| Barrier poly Bev-Seal Ultra 235 · Accuflex | Beer & product lines, long runs, taps that change beers | Internal dual barrier prevents flavor permeation; works with pungent flavors; allows quick flavor changeovers; NSF 51 & 61, FDA approved |
| Vinyl Accuflex | Short jumpers, economy runs, drain lines | Very flexible and low cost; can absorb and hold flavors over time, so less ideal for long product runs |
| Reinforced / braided | Gas & higher-pressure lines | Braid reinforcement for added strength under pressure where thin-wall tube could fail |
| High-temperature Silicone | Hot water, coffee, hot-side lines | Rated for sustained heat where standard vinyl would soften or fail |
| PVC-free Eldon James | Applications needing a PVC-free / specialty material | Food-grade alternative where PVC isn't suitable |
| Glycol line | Coolant loop in long-draw / trunkline systems | Carries chilled glycol alongside product lines — coolant, not product |
Tubing selector
The same five questions our team asks, one at a time. You'll get a recommendation as soon as you've answered the first.
Ordering a 500-ft roll? Worth a 5-minute check first. Talk to a Foxx specialist →
What's running through the tubing?
This is the master question — it sets the material before anything else.
Anything that touches the product needs to be food-grade, and for product lines the standard is barrier tubing. Foxx builds most of its product lines and trunklines around Accuflex Bev-Seal Ultra Series 235 — a polyolefin tube with an internal dual barrier that prevents flavor permeation, works with pungent flavors, and allows quick flavor changeovers without taste transferring to the next beer. It's NSF 51 & 61 certified and FDA approved. That barrier is why it beats plain vinyl on any line that matters: ordinary vinyl can absorb and hold flavors over time, so an old line can taint a fresh keg.
Vinyl still has its place — short jumpers, economy runs, and drains, where it's cheap and extremely flexible. Gas and CO2 lines use gas-rated tubing rather than product tube. Glycol runs in its own dedicated coolant line. And hot lines get high-temp tubing (next question). Match the material to the contents first; the rest of the spec follows.
What temperature runs through it?
Heat is the fast way to destroy the wrong tube.
Standard beverage tubing — vinyl and barrier poly — is built for cold or ambient product, which covers nearly all beer and soda lines. The moment a line carries something hot, the rules change. Hot water, coffee, and hot-side sanitation lines need high-temperature tubing, typically silicone, which is rated to hold up to sustained heat. Run hot liquid through standard vinyl and it will soften, deform, and eventually fail. If your build includes a coffee or hot-water leg, spec that section separately from the cold product lines.
What pressure rating does it need?
Every tube has a working pressure. The job is to stay under it — at your real operating temperature.
Match the tube's rated working pressure to the application. Barrier beverage tubing like Bev-Seal Ultra 235 carries a working pressure around 150 psi at 70°F, which comfortably covers beer (low pressure) and most carbonated product. Carbonated soda and water run higher — commonly in the 100–160 psi range — and high-pressure CO2 gas can call for reinforced or braided tubing that won't balloon or rupture. One detail that trips people up: a tube's pressure rating drops as temperature rises, so rate the line for the conditions it actually sees, not just the spec at 70°F.
How flexible does it need to be?
Flexibility is a routing question — and a small trade-off against barrier performance.
If the line has to make tight turns or snake around equipment, it needs to bend without kinking. Vinyl is the most flexible option, which is part of why it's favored for short jumpers. Bev-Seal Ultra is lightweight and very flexible for a barrier tube, and Foxx's bundled trunklines use a film wrap over the tubes specifically to give excellent flexibility and tight-bend capability across a whole bundle. The general trade-off: the highest barrier performance can come in a slightly stiffer wall, so if you need both a hard bend radius and flavor protection, say so up front and we'll spec a line that does both.
Which clamp size corresponds to the tubing?
Clamp size follows the tube's outside diameter — not the inside.
The bore you flow through is the ID (common beverage IDs: 1/4″, 5/16″, 3/8″). The clamp sizes to the OD, which is the ID plus the wall thickness. Foxx uses Oetiker Stepless ear clamps, which have no steps or gaps on the inner band and give uniform 360° compression for a leak-free seal — well suited to thin-walled beverage tube.
The sizing rule: select the nominal clamp size nearest to, but always slightly larger than, the tubing's outside diameter — measured with the fitting fully assembled. Two things to watch: a multiple-barb fitting can require a larger clamp than a single-barb one, and a properly closed ear clamp should have its ear width reduced by at least 40% when pinched.
Spec the line once, pour clean for years
Tubing is cheap to order and expensive to redo once it's run through a wall. Worth a 5-minute check before the roll ships.
Have Foxx confirm your tubing spec
Tell us what's running through it, the temperature and pressure, the routing, and your line size. We'll match the tube, the clamp, and the fittings — and build a custom trunkline if your run calls for one.
Related guides: Direct Draw vs. Long Draw · FOBs, Beer Pumps & Gas Blenders · Regulators.
Frequently asked questions
What kind of tubing do I need for my system?
What is barrier tubing and do I need it?
What tubing should I use for high-temperature lines like coffee or hot water?
What pressure rating does my tubing need?
How do I choose the right clamp size for my tubing?
What's the difference between tubing ID and OD?
Foxx Equipment Company — commercial beverage dispensing equipment and expertise. Pressure and temperature figures above are typical references, not guarantees; always confirm a tube's printed ratings against your operating conditions. Contact a specialist to spec your lines.