Direct Draw vs. Long Draw: When to Spec Each
The decision between direct draw and long draw isn't about preference — it's about distance, temperature, BTU load, and how much the customer expects to pour on a busy Friday night. Here's how to make the right call before you quote the job.
The short answer
Spec a direct draw system when the keg sits within roughly 5 feet of the faucet — typical of kegerators, back bars, and reach-in coolers. Spec a long draw system any time the keg cooler is more than 5 feet away or in a separate room, which requires a glycol-cooled trunk line to hold pour temperature.
What is a direct draw beer system?
Keg and faucet share one refrigerated enclosure — the simplest draft architecture there is.
A direct draw system stores the keg and pours the beer from the same refrigerated enclosure. The cold air around the keg cools the beer line for its entire length, which is usually only a few feet of vinyl or polyethylene tubing running from the coupler up through the top of the cooler into the faucet shank.
Because the line is short and the entire system sits at serving temperature, direct draw setups need no separate cooling for the beer line, no glycol power pack, and no insulated trunk bundle. That's why they dominate kegerators, home bars, back bars, jockey boxes, and small restaurants where the keg cooler sits directly under or behind the pour station.
What is a long draw beer system?
Keg cooler and pour station are separated — and a glycol-cooled trunk line carries the beer cold across the distance.
A long draw system separates the keg cooler from the pour station — sometimes by a few feet, sometimes by 100 feet across a basement or up to a second floor. To keep beer at 36–40°F across that distance, the beer line is bundled inside an insulated trunk line alongside two glycol lines: one supply, one return. A glycol power pack circulates chilled propylene glycol through the bundle, holding the beer line cold from keg to faucet. Foxx builds custom trunklines around Bev-Seal Ultra tubing by Accuflex; always use food-safe propylene glycol, and never mix glycol types.
That architecture lets operators put kegs in a walk-in cooler and free up valuable floor space behind the bar — but it adds cost, complexity, and components that all have to be sized correctly. Get the math wrong and you'll be back the next week diagnosing foam.
Cooling: Ambient air in cooler
Pressure: 10–14 PSI CO₂
Use case: Kegerators, back bars
Cooling: Glycol-chilled trunk
Pressure: 18–35 PSI applied
Use case: Restaurants, breweries
Side-by-side: direct draw vs. long draw
Print this table, tape it to your service truck. These are the variables that decide which system you spec — every other consideration follows from them.
| Specification | Direct Draw | Long Draw |
|---|---|---|
| Maximum practical run | ~5 ft from keg to faucet | 5–100+ ft, glycol required beyond 8–10 ft |
| Cooling method | Refrigerated cabinet air | Glycol power pack + insulated trunk bundle |
| Applied gas pressure | 10–14 PSI CO₂ (most ales/lagers) | 18–35 PSI, often mixed gas (75/25) |
| Gas blend | Straight CO₂ for most beers | Beer gas (N₂/CO₂ blend) common for balance |
| Equipment footprint | Self-contained, plug-and-pour | Walk-in + glycol pack + trunk run |
| Installed cost | $1,500–$5,000 typical | $8,000–$50,000+ depending on lines and length |
| Maintenance complexity | Low — line cleaning + couplers | Moderate — glycol levels, trunk insulation, balance |
| Throughput capacity | 1–4 taps typical | 4–60+ taps, ideal for high volume |
Which system fits you?
Three questions settle most decisions — and the first usually settles it on its own.
The cost of getting the architecture wrong shows up every shift. A Foxx specialist will spec it against your floor plan, run lengths, and beer list. Talk to an expert →
When to spec a direct draw system
Direct draw shines anywhere keg storage and pour location can share a footprint.
The math is simple, the failure modes are few, and your install time on a typical two-tap setup is measured in hours, not days.
Back-of-house cafés & tasting rooms
Two to four taps under the bar with kegs directly below. No trunk to run, no glycol to bleed, no ceiling penetration to negotiate.
Home, office, and small-format venues
Kegerators and 1–2 tap commercial direct draw boxes. Customer wants beer on tap, not an engineering project.
Mobile bars and event installs
Jockey boxes and portable direct draw stations. Coil-in-ice or cold plates keep beer cold during short pour windows without glycol infrastructure.
Convenience stores & growler fill stations
Reach-in coolers with through-door towers. High visibility, low complexity, fast deployment.
When to spec a long draw system
Long draw is the right answer whenever the customer wants more taps than will fit behind the bar, wants kegs out of sight, or pours at a volume reach-in coolers can't keep up with.
It's the standard architecture for any serious brewpub, restaurant, stadium, or multi-tap craft bar.
Restaurants & brewpubs with 8+ taps
Walk-in storage for keg rotation, glycol-chilled runs to a tower or wall-mounted faucet bank. The only way to scale tap count without sacrificing floor space.
Multi-floor installs
Brewery taproom upstairs, cold storage downstairs. Long draw with a properly sized glycol pack handles vertical lift plus horizontal run.
Stadiums, arenas, and large venues
Centralized cold rooms feeding dozens of pour points across concourses. Often combined with FOB detectors to eliminate waste at keg changeover.
Hotels & multi-bar properties
One walk-in feeding lobby bar, pool bar, and rooftop. Long draw with zoned glycol loops and dedicated regulators per beer.
Before you design a long draw system, answer these
How long are the runs, and what are the ambient temperatures and elevation changes along the path? Is glycol maintenance understood by the operator? Are there highly carbonated beers, nitro products, or seltzers and cocktails going on tap? Could the tap count double in a year or two? Will multiple bars share one keg inventory? These answers drive the gas blend, the glycol pack size, and the line balancing — get them on paper before you quote.
The four-question decision framework
Before you quote, walk the site and answer these four questions. They will determine the right system every time.
The installer's decision rules
How far is the keg from the faucet? Under 5 feet, direct draw. 5 to 8 feet, direct draw is still usually fine with proper insulation. Over 8 feet, you're in long draw territory and you need glycol.
How many taps? Up to 4, direct draw is often the simplest and most reliable answer. Over 4, the keg footprint behind the bar usually forces you to a walk-in and a trunk run.
What's the keg-change cadence? If staff are swapping kegs more than once a service, prioritize walk-in access and long draw. Crawling under a back-bar for a keg change kills service speed.
What's the ambient between cooler and tower? If beer runs through unconditioned space — basement ceiling, exterior wall, hot mechanical room — long draw with glycol is mandatory regardless of distance. Direct draw assumes the entire path stays cold.
Build the system — components by type
Every system shares the same five categories of components: kegs and couplers, gas supply, lines and bundles, cooling, and the pour station. The product list changes dramatically based on which architecture you choose.
Beer Keg Couplers (Sankey, A, G, M, S, U)
Match the coupler to the keg type. American Sankey, European Sankey, and import couplers for every common keg standard.
Shop Couplers →Primary CO₂ Regulators
Single- and dual-gauge regulators for direct draw setups running straight CO₂ at 10–14 PSI.
Shop Regulators →Direct Draw Dispensers & Towers
1- to 4-tap towers, under-bar dispensers, and direct draw refrigeration units in chrome and stainless.
Shop Dispensers →Glycol Chillers & Power Packs
Capacity matched to line count, run length, and ambient conditions. Includes propylene glycol and chiller accessories.
Shop Glycol Chillers →Trunkline Cooling Systems
1/4", 5/16", and 3/8" ID trunkline bundles built around Bev-Seal Ultra barrier tubing by Accuflex, with glycol supply/return and high-R insulation.
Shop Trunklines →Gas Blenders, Generators & Infusers
75/25 N₂/CO₂ blenders, nitrogen generators, and secondary regulator panels for multi-keg long draw installs.
Shop Gas Equipment →Common installer mistakes — and how to avoid them
These are the issues we see on service calls again and again. Most get baked into the system at the spec or install stage, not the operating stage.
Treating a 7-foot run as direct draw
The cabinet air won't keep the line cold once it exits the cooler. Beer foams on the first pour after a quiet hour. Either keep the run under 5 feet or commit to a glycol-chilled trunk.
Undersizing the glycol pack
BTU load is a function of line count, length, ambient temperature, and pour rate. Spec'ing a 1/3 HP unit because it fit the price target is the most common cause of warm pours on a 16-line system. Run the numbers.
Ignoring elevation in pressure calculations
Every foot of vertical lift adds roughly 0.5 PSI to applied pressure requirements. A keg in the basement feeding a second-floor tap needs significantly more pressure than a flat run of the same length.
Mismatching gas blend to system type
Long draw at 25+ PSI on straight CO₂ over-carbonates beer fast. Switch to a 75/25 nitrogen/CO₂ blend or install a gas blender so applied pressure pushes the beer without changing its carbonation.
Skipping the line-balancing math
Pick the right inside diameter and resistance for each beer. Same trunk, same length, but a stout and a pilsner need different restrictor configurations to pour clean.
Frequently asked questions
What is the maximum run length for a direct draw beer system?
Direct draw is typically limited to runs under 5 feet from keg to faucet. Beyond that, line resistance and temperature management push you into long draw with glycol cooling.
Do long draw beer systems always need glycol cooling?
Yes — any run over roughly 8 to 10 feet should be glycol-cooled to maintain pour temperature between 36 and 40°F and prevent foaming. Air-cooled long draw exists but is rarely the right call for commercial volume.
What pressure should I use for a long draw system?
Applied pressure is the sum of beer equilibrium pressure, line resistance, and elevation pressure. For most long draw setups, applied gas pressure lands between 18 and 35 PSI, typically using a 75/25 nitrogen/CO₂ blend to keep carbonation stable.
Can I convert a direct draw system to long draw later?
Technically yes, but it's rarely cost-effective. The cooler, lines, regulators, and tower will all be wrong for the new architecture. Plan for the customer's three-year volume forecast at spec time, not their opening day.
How much does a long draw beer system cost to install?
Typical commercial long draw installs run $8,000 to $50,000+ depending on tap count, trunk length, glycol capacity, and finish-out of the tower and back bar. The biggest variables are line count and run length.
Specify the right system. Win the job.
Foxx Equipment has supplied beverage installers for over 40 years — trade pricing, same-day shipping on stock items, and a technical team that knows the difference between a 3/16" choker and a 1/4" trunk line.
Foxx Equipment Company — commercial beverage dispensing equipment and expertise. Run lengths, pressures, and costs above are typical ranges, not guarantees; system architecture depends on your floor plan and volume. Contact a specialist to spec your draft system.