Most draft beer installation guides assume you already know which system type you need. This one doesn’t. Whether you’re setting up a kegerator behind a home bar or spec’ing a six-tap glycol-cooled long-draw system for a Colorado restaurant, the installation steps, components, and costs differ significantly by system type.
This guide covers all of it: system selection, required components, glycol chiller sizing, the full step-by-step installation sequence, gas pressure settings, and post-installation maintenance. Where the two paths diverge, we’ll tell you exactly where and why.
Direct-Draw vs. Long-Draw vs. Glycol-Cooled: Which System Are You Actually Installing?
The answer to this question determines every subsequent decision: line diameter, gas pressure, whether you need a glycol chiller, and how disruptive the installation will be. Get this wrong at the start and you’ll be pulling lines back out of walls.
| Direct-Draw | Long-Draw (Air-Cooled) | Glycol-Cooled | |
| Keg location | Directly below the tap | Remote cooler or walk-in | Remote cooler or walk-in |
| Line length | 2–4 feet | 10–25+ feet | 10–25+ feet |
| Glycol chiller required | No | No | Yes |
| Temperature control | Ambient, no assist needed | None built in over distance | Holds within 0.5°F of target |
| Best for | Home bars, kegerators, small bars with a single tap run | Commercial bars where the cooler is behind a wall or in a basement | Runs over 25 ft, or any run through un-air-conditioned space |
| Key hardware | Standard coupler, short lines | Insulated trunk line | Micro-Matic or Perlick glycol chiller + jacketed trunk line |
Direct-Draw (Kegerator or Under-Bar)
The keg sits directly below the tap, typically within 2 to 4 feet. The CO₂ regulator mounts on or near the keg. Beer lines are short. No glycol is required. This is the correct choice for home setups, small bars with a single tap run, or back-bar kegerator installs where the cooler is directly beneath the tower.
Long-Draw (Air-Cooled or Glycol-Cooled)
The keg is stored in a remote cooler or walk-in. Beer lines run 10 to 25 feet or more through an insulated trunk line to the tap tower. Temperature control across that run requires a recirculating glycol chiller. This is standard for commercial bars where the cooler sits behind a wall or in a basement below the bar.
Glycol-Cooled Systems
Glycol-cooled is a subset of long-draw, not a separate category. The glycol chiller pumps a water and glycol mix through a jacketed trunk line alongside the beer lines. This holds beer temperature within 0.5°F of target regardless of ambient conditions. For any run exceeding 25 feet, or for runs through un-air-conditioned spaces, glycol cooling is not optional. Denver Beverage specs Micro-Matic and Perlick hardware for these systems.
Nitro and Mixed-Gas Systems
Bars adding Guinness or craft nitro pours need to understand that the hardware diverges completely from a standard CO₂ setup. Nitro dispensing requires a 75%/25% nitrogen and CO₂ blended gas supply, a separate regulator rated for that blend, and stainless-compatible forward-sealing faucets.
Note: Nitro and mixed-gas dispensing is a variant that layers onto any of the three system types explained above.
As Micro-Matic’s dispensing knowledge center explains, nitrogen gas is used specifically because it does not carbonate beer the way CO₂ does, which is what produces the characteristic creamy cascading pour. You cannot run nitro beer through a standard CO₂ line setup and expect correct results. If you’re adding even one nitro tap, plan for a separate gas circuit from the start.
What You Need Before Installation Starts: Components and Equipment Checklist
Before a single line gets run, every component below needs to be identified, ordered, and on-site. Missing one item on installation day causes delays that ripple across your build schedule.
Keg Coupler
The coupler connects the gas line and beer line to the keg valve. The coupler must match the keg or nothing works. American Sankey D-type covers most domestic and craft kegs. European imports use S-type, G-type, or A-type couplers depending on origin. Specifying the wrong coupler is the most common pre-installation error.
CO₂ Regulator and Cylinder
CO₂ cylinders use a CGA 320 fitting. If you’re running a nitro or blended gas system, the cylinder requires a CGA 580 fitting, which is the standard for nitrogen and inert gas service. These two fittings are not interchangeable. Attempting to force a CGA 320 regulator onto a nitrogen cylinder is a safety risk, not just an installation error.
For multi-tap systems running both CO₂ and blended gas, you need separate regulators with the correct CGA fitting for each gas type. Denver Beverage’s beverage gas supply covers both CO₂ and blended gas delivery across the Front Range.
Beer Lines
Use 3/16″ ID tubing for direct-draw runs up to 8 feet. Long-draw systems require 1/4″ ID or larger to manage flow resistance across the full run length. Line diameter and run length together determine the flow resistance in PSI per foot. Getting this calculation wrong produces foam regardless of how correctly the regulator is set.
Faucet Shank, Faucet Body, and Tap Handle
For commercial installations, Perlick faucets are the industry standard. Specify Perlick’s forward-sealing faucet design for any line that sits idle between service periods. Forward-sealing faucets prevent beer from drying inside the faucet body, which eliminates a common source of sticky handles and off-flavors on the first pour of the day.
Tap Tower or Tower Collar
The tower mounts to the bar top and houses the faucet shanks. The contractor needs the countertop hole diameter before bar build-out is finished. For available tower configurations and hardware options, see Denver Beverage’s draft systems page. This spec is included in every Denver Beverage quote.
Drip Tray
Surface-mount or recessed. The drip tray choice affects bar top cutout dimensions. Confirm this with your contractor before build-out.
Glycol Chiller (Long-Draw Only)
Required for any run exceeding 8 feet where you need to hold serving temperature at the faucet. Sizing methodology is covered in the next section.
Cold Room or Cooler
Target cold room temperature is 36 to 38°F. Temperature above this range at the keg is the starting point for foam and carbonation problems downstream.
How to Size a Glycol Chiller for a Long-Draw System
No competitor explains this clearly. Here is the practical methodology Denver Beverage uses on every site visit.
Three variables determine chiller size:
- Draw length: The distance from your cooler to the farthest tap, measured in feet. This is the single biggest input. The longer the run, the more BTU capacity the chiller needs to maintain temperature at the tower end.
- Tap count: Each additional product line running through the trunk adds heat load. A 10-tap system through a 40-foot run needs more chiller capacity than a 3-tap system over the same distance.
- Ambient temperature of the line path: A trunk line running through an un-air-conditioned kitchen corridor in a Colorado summer requires more chiller capacity than the same run through a climate-controlled back-of-house. This factor is frequently ignored in generic sizing guides and causes underperforming systems in real installations.
As a working rule of thumb, a single-zone chiller handles up to roughly 100 feet of trunk line under normal ambient conditions. Multi-zone chillers are required for longer runs or branching systems that serve multiple bar stations from one cooler.
Denver Beverage measures draw length during the site visit and specs the glycol chiller to match before generating a quote. This is not something you can accurately estimate from a floor plan alone.
The Installation Process, Step by Step
Step 1: Site Survey and System Spec
Measure draw length from the cooler to the tower location. Confirm tap count, cooler placement, and tower position. The contractor needs the countertop hole diameter and drip tray dimensions before the bar top is built. Denver Beverage provides these specs in the custom quote, typically within 2 to 3 business days of the site visit.
Custom towers that require manufacturer quotes may extend this timeline. For an overview of what draft beer system installation and service covers, including equipment options and service territory, see the Denver Beverage draft beer services page.
Step 2: Order Components and Schedule Installation
A 50% deposit triggers the parts order. Most standard components are stocked. Complete systems using off-the-shelf towers and standard Sankey couplers can often be installed within 1 to 2 weeks of deposit. Custom towers extend this timeline.
Step 3: Run and Insulate the Trunk Line
For long-draw systems, route the jacketed trunk line from the cooler through walls or ceiling to the tower location. Insulate every segment. This is the most structurally disruptive step in the installation. Coordinate trunk line routing with your general contractor before the bar build-out is finished. Retrofitting a trunk line through a finished wall costs significantly more than running it during construction.
Step 4: Mount the Tower and Shank
Set the tower, drill the countertop opening to spec, and mount the faucet shank through the bar top. Torque matters here. An overtightened shank will split a bar top. An undertightened one will leak. Neither is a problem you want to discover during the first busy service.
Step 5: Connect the Beer Lines
Run lines from the keg coupler through the trunk to the shank. For direct-draw, short runs use clamp connections. For long-draw, line inner diameter must be matched to the run length to maintain the correct flow resistance. Flow resistance is measured in PSI per foot of line. This is why line diameter selection in the Components section is not interchangeable between system types.
Step 6: Install and Set the CO₂ Regulator
Mount the regulator on the cylinder using the correct CGA fitting: CGA 320 for CO₂, CGA 580 for nitrogen or blended gas. Connect to the gas manifold if running multiple taps. Set primary pressure to 10 to 14 PSI for a standard lager at 38°F over a short run. Long-draw systems require higher primary pressure to overcome line resistance.
A 20-foot run may need 25 to 30 PSI at the primary regulator even though the target serving pressure at the faucet is still approximately 12 PSI. Incorrect pressure is the leading cause of foam on newly installed systems.
Step 7: Connect and Start the Glycol Chiller (Long-Draw Only)
Fill the chiller with food-grade propylene glycol and water, typically at a 30/70 ratio for Front Range temperature conditions. Circulate the glycol mix and verify temperature at the tower end before connecting beer lines. The tower end temperature should read within 0.5°F of your target serving temperature before beer lines are attached.
Step 8: Tap the Keg and Purge the Lines
Connect the coupler to the keg valve, open the gas, and purge air from the lines. Pull the first pint and check three things in order: temperature at the glass (target 36 to 38°F), carbonation level, and foam. If any reading is off, adjust gas pressure and carbonation levels at the regulator before the system is considered operational.
Step 9: Final Check and Handoff
Verify every connection is leak-free. Confirm the tower collar is fully seated. Confirm the drip tray is level. Denver Beverage collects the remaining balance after the system is tested and pouring correctly. The system is not considered commissioned until the first pour meets temperature, carbonation, and foam specifications.
Setting Gas Pressure Correctly, and Why Getting It Wrong Causes Foam
Foam is the most common complaint after a new installation. In the majority of cases, the cause is incorrect gas pressure, not a defective component.
The baseline for most American lagers and ales:
- Serving temperature: 38°F
- Draw length: 2 to 4 feet (direct-draw)
- Correct primary pressure: 10 to 14 PSI
Adjusting for long-draw runs:
Add approximately 1 PSI per foot of horizontal run beyond 8 feet to overcome line friction. A system with a 20-foot run needs roughly 25 to 30 PSI at the primary regulator to deliver the correct serving pressure at the faucet.
Carbonation targets vary by beer style:
- American lagers: 2.5 to 2.7 volumes CO₂
- Ales: 2.0 to 2.5 volumes CO₂
- Guinness and nitro pours: dispense at 38 PSI using a 75/25 nitrogen and CO₂ blend through a CGA 580-fitted regulator
The foam troubleshooting sequence:
If beer is consistently foamy immediately after installation, check in this order:
- Gas pressure (most common cause)
- Serving temperature (cooler or cold room too warm)
- Line cleanliness (less common after a fresh install, but relevant if lines sat dry for an extended period)
Do not adjust carbonation volume at the keg until you have ruled out pressure and temperature as causes. Adjusting the wrong variable first adds time and wastes product.
Line Cleaning Schedule and Maintenance After Installation
The Brewers Association Draught Beer Quality Manual is explicit on this: clean beer lines every two weeks at minimum for commercial draft systems. This is not a suggestion. Biofilm, yeast, and beer stone accumulate in lines within days of first use.
What a full line cleaning involves:
- Flush lines with a caustic beer line cleaning solution at 1.5 to 2% concentration
- Water rinse to clear the caustic solution
- Acid rinse to neutralize and remove beer stone
- Final water rinse before returning to service
The full process takes 20 to 30 minutes per line. In a 10-tap bar, that is a meaningful labor commitment done every two weeks.
Dirty lines are the second most common cause of off-flavors and foam problems, after incorrect gas pressure. A system that poured perfectly on installation day will produce off-flavors within a month if lines are not cleaned on schedule.
Denver Beverage offers quarterly and monthly maintenance contracts for draft systems it installs. If you’re operating a bar or restaurant in Colorado and want the cleaning schedule handled by the same team that spec’d and installed the system, see the Denver Beverage restaurants and bars page for a full overview of ongoing service options.
What Does a Commercial Draft Beer System Cost?
The industry baseline for a fully installed commercial draft tap is approximately $1,000 per tap. This covers equipment, hardware, and labor for a standard single-zone direct-draw or short long-draw setup using off-the-shelf components.
What drives cost higher:
- Custom tap towers requiring manufacturer fabrication
- Long-draw runs requiring glycol chillers (chiller cost adds to the per-tap baseline depending on zone count and BTU capacity)
- Mixed-gas manifolds for multi-product systems running both CO₂ and blended gas
- Contractor coordination required for in-wall trunk line runs through finished spaces
- High ambient temperature environments requiring oversized chiller capacity
What keeps cost lower:
- Stocked components with no lead time
- Direct-draw setups under 8 feet using standard Sankey couplers
- Standard off-the-shelf tower configurations
The yield argument for investing in correct spec:
A poorly calibrated long-draw system produces excess foam. Foam is beer you paid for and cannot sell. A system with incorrect line diameter or inadequate glycol chiller capacity can waste 10 to 20% of every keg poured. On a high-volume draft bar moving 20 or more half-barrel kegs per month, that waste compounds quickly into measurable revenue loss. The cost of a correctly spec’d installation is not just a capital expense. It is a direct input into your draft program’s profitability.
Denver Beverage does not publish a fixed price list because every installation is site-specific. The quote covers everything needed for your exact draw length, tap count, tower configuration, and building conditions. To start the process, contact Denver Beverage for a site visit and custom quote. Site visits are typically scheduled within a few business days of initial contact.
FAQ
How long does a draft beer system installation take?
For stocked components, most systems install within one to two weeks of the deposit. Custom towers extend that timeline since they require a manufacturer quote first. The site visit itself, where draw length and tap count get measured, typically produces a spec within two to three business days.
What’s the difference between direct-draw and long-draw systems?
Direct-draw keeps the keg within a few feet of the tap, with no glycol chiller required. Long-draw stores the keg in a remote cooler and runs beer lines 10 feet or more through an insulated trunk line, which requires a recirculating glycol chiller to hold temperature across the distance. The choice determines line diameter, gas pressure, and installation complexity.
Do I need a glycol chiller for my draft system?
If your keg sits directly below the tap, no. If the beer lines run more than roughly 8 feet, especially through an un-air-conditioned space, a glycol chiller is what keeps the beer cold enough to pour correctly by the time it reaches the tower. Any run over 25 feet needs one regardless of ambient conditions.
What pressure should a draft beer system be set to?
Most American lagers and ales pour correctly at 10 to 14 PSI on a short, direct-draw run. Long-draw systems need more, roughly 1 additional PSI per foot of run beyond 8 feet, to overcome line friction. Getting this number wrong is the leading cause of foam on a newly installed system.
Can I add a nitro tap to an existing CO2 system?
Not without separate hardware. Nitro dispensing requires its own gas blend, a separate regulator rated for that blend, and stainless-compatible forward-sealing faucets. You can’t run a nitro pour through a standard CO2 line and expect it to work.
Should I install a draft system myself or hire a professional?
A single-tap kegerator with a short direct-draw run is a reasonable DIY project. A multi-tap commercial system with a long-draw run, glycol chiller, and in-wall trunk line involves torque specs, gas fitting standards, and contractor coordination where a mistake is expensive to undo. Denver Beverage handles both, but the commercial side is where professional installation earns its cost.
