A draft beer setup in a catering trailer or food truck can be one of the biggest revenue drivers—but only if the system is designed for reality: how much beer (or other kegged drinks) you’ll actually be pouring, where you’ll keep the kegs, and what conditions you’ll have at events.
In this article, you’ll find:
- what the most common types of draft systems for trailers are,
- whether it’s better to keep kegs inside in refrigeration or outside in the back-of-house,
- and practical recommendations on how to choose a solution without unnecessary mistakes.
1) First, clarify your pouring volume: beer as the main product vs. an add-on
This is the most important decision, because it determines:
- how much beer you need to be able to chill and keep cold,
- how often you’ll be changing kegs,
- and whether it makes sense to carry kegs in/out or keep them permanently in the back-of-house.
A) Beer is the main product (bar, festivals, big rushes)
- you need stable cooling even at high flow rates,
- you need easy handling of kegs,
- it’s often worth keeping kegs in the back-of-house / an external box (quick swaps, more space inside),
- the system is usually designed for performance (more taps, better line cooling, more robust pressure setup).
B) Beer is an add-on (food is primary, beer is a smaller share of sales)
- the volume is usually lower and more consistent,
- a simpler solution is often completely sufficient,
- A keg inside a fridge can be ideal (short lines, easy operation, fewer variables).
2) The most common draft systems for a catering trailer or food truck
In practice, these groups of solutions are used in trailers most often:
2.1 Draft system with the keg in a fridge (so-called “direct draw” / kegerator)
When it makes sense:
- when beer is an add-on or you’re pouring smaller volumes,
- you want a simple, compact system,
- you want as few “variables” as possible (long lines, insulation, extra cooling).
Advantages:
- short lines = lower risk of temperature issues along the run,
- easy setup and servicing,
- a clean, straightforward solution.
Disadvantages:
- takes up space inside,
- if you pour a lot and change kegs often, it can be more operationally demanding (handling, space).
2.2 Contact / “dry” cooler (so-called dry cooler, flow-through cooler) + keg as needed
This includes solutions where the beer is cooled in a cooling block (contact cooling, “dry” – without a water bath), often used for mobile draft setups at events.
When it makes sense:
- you want a more mobile, quick-to-deploy system,
- typically for events where you need performance but don’t want a big built-in system,
- when you want the technology outside the interior (because of noise/heat).
Advantages:
- good performance for mobile use,
- can be sensibly placed in an external box (airflow, noise),
- easy servicing and access.
Disadvantages:
- you still have to solve where the kegs will be (inside/outside) and keep them at a reasonable temperature,
- in extreme temperatures and at high output, you need to think about the whole system (cold keg stock, insulation).
2.3 Long draw system (kegs in the back-of-house + lines to the taps)
This is a solution where the kegs stand, for example, in an external box or in the rear technical area, and the beer runs through longer lines to the taps.
When it makes sense:
- when beer is the main product and you change kegs often,
- you want more space inside for staff to work,
- you need more taps and better workflow.
Advantages:
- easier keg changes (especially when they’re outside),
- more space inside,
- suitable for higher output.
Disadvantages:
- longer lines require better planning (line cooling, insulation, pressure setup),
- more components = more things that need to be done right.
3) Kegs inside vs. outside: practical recommendation from experience
Kegs inside (in a fridge)
We recommend it when:
- you’re pouring a smaller volume or beer is an add-on,
- you want a simple solution without complex lines,
- you want to minimize the risk of a “warm run.”
Kegs in the back-of-house / external box
We recommend it when:
- beer is the main product and you change kegs often,
- you don’t want to carry kegs in/out during peak times,
- you need more space inside for staff,
- and you want the technology (compressor/cooling) outside the interior.
4) Why it makes sense to put the technology in an external box (airflow + noise)
Regardless of the system type, it often holds true that:
- the compressor and cooling units generate heat,
- they need airflow,
- and inside they create noise that’s unpleasant at the bar.
That’s why we often design the technology to be placed in an external technical box:
- better cooling and more stable performance,
- less noise inside,
- easier servicing and access without disrupting operations.
5) The most common mistakes (and how to avoid them)
- Choosing a system without first clarifying the pouring volume.
- Kegs inside for large volumes—then it turns into a logistics problem.
- Long lines without thinking through line cooling/insulation.
- Technology without airflow—overheating, weaker performance, outages.
- Underestimating line cleaning and the maintenance routine.
Notice
Draft systems work with pressure and gas and must be designed safely and installed correctly. The details matter (line lengths, insulation, pressure, gas type, cooling, technology placement).
Gastronova’s final recommendation
If you’re planning a draft setup for a catering trailer or food truck, always start with this question:
Will beer be the primary product or an add-on?
- If beer is an add-on and you’re pouring a smaller volume, a simple solution with the keg in a fridge often wins.
- If beer is the main product and you’re pouring a lot, a solution with kegs in the back-of-house and the technology in an external box is usually more practical (for keg changes, space, airflow, and noise).
- A contact/dry cooler is a good route when you want an event-ready solution that’s powerful and also practical to place outside the interior.
At Gastronova, we can design a custom draft setup to match your concept: number of taps, expected pouring volume, keg placement, external box, and staff workflow.
FAQ – most common questions and answers
What’s the best draft setup for a catering trailer or food truck?
It depends on whether beer is the main product or an add-on. If beer is an add-on and you’re pouring smaller volumes, a simple solution with a keg in a fridge (direct draw). If beer is the main product (festivals, bar), a system with kegs in the back-of-house and more robust cooling/lines usually makes sense so you can handle peak times.
What’s the difference between a keg in a fridge and a keg in the back-of-house behind the trailer?
A keg in a fridge is easier to set up (short lines), but it takes up space and, at high volume, it’s harder to swap kegs frequently. A keg in the back-of-house (external box) saves space inside and makes keg changes easier, but it requires better planning of the lines and cooling so the beer stays cold all the way to the tap.
When does a “dry” (contact) beer cooler make sense?
When you want a higher-performance, event-practical solution that can also be placed outside the interior (because of noise and heat). A dry/contact cooler is a common choice for mobile draft setups, especially if you need flexibility and fast service.
Why is it good to place the compressor or technology in an external box?
Because the technology needs airflow to dissipate heat and inside it creates noise, which is unpleasant for staff. An external box usually improves performance stability, reduces overheating, and makes servicing easier.
How many taps do I need in a trailer?
It depends on the type of events and your goal. As a rule:
- smaller add-on draft setup: 1–2 taps,
- beer as the main product: 2–4 taps (sometimes more).
More important than the number of taps is whether you can handle keg changes and whether the cooling will hold a stable temperature during peak times.
Why does my draft system foam or the pour quality fluctuate?
The most common reasons are:
- incorrect beer temperature (or a “warm run” in the line),
- incorrect pressure settings,
- unsuitable hose length/type,
- dirty lines (cleaning),
- pouring too fast with insufficient cooling.
The solution is always a combination: proper cooling, the right line run, and correct pressure settings.
How often should draft lines be cleaned in a catering trailer or food truck?
It depends on how intensively you operate, but the rule is: the more you pour, the more often you need to clean. With regular operation, it’s good to have a fixed cleaning schedule, and at events at least a check and flush as needed (especially during breaks and storage).
What’s the best overall recommendation for a draft setup in a trailer?
First answer: how much beer you’ll actually be pouring (main product vs. add-on). Then decide whether the kegs will be inside or in the back-of-house. And finally, design the technology placement so it has airflow and doesn’t disturb with noise. That will save you the most money—and stress.
