Clean beer lines are crucial for taste, aroma, and hygiene. Off-flavors, a sour taste, cloudiness, or visible residue in the beer line are clear warning signs that cleaning should not be delayed.
Cleaning the beer line: Instructions, cleaning agents and intervals
Whether rinsing, cleaning a beer line with foam balls, or using chemicals is appropriate depends on the system, the piping route, the level of soiling, and the manufacturer's instructions. Here you will find the practical sequence, typical occasions, suitable aids, cost factors, and information on documentation in the workplace.
Why dirty lines impair taste and hygiene
Dispensing systems are not maintenance-free closed systems. Product residue, moisture, and deposits can adhere to the inner walls of the lines as well as to the dispensing head, couplings, and tap. Microorganisms and deposits then alter the aroma, taste, and freshness of the beer. Cleaning should be carried out at the latest in the event of quality loss, off-odors, or visible soiling.
When cleaning is due
It is not possible to answer how often you should clean a beer line with a single figure. Usage, beverage type, line routing, and manufacturer specifications determine the appropriate rhythm – explained in detail in Cleaning a dispensing system – how often?.
| Occasion | Classification |
|---|---|
| Before first commissioning | Clean and rinse thoroughly before dispensing for the first time. |
| After prolonged downtime | Clean before restarting, as downtime promotes residue buildup. |
| In the event of quality deviations | Check and clean immediately in the event of off-flavors, off-odors, or cloudiness. |
| During ongoing operation | According to a fixed plan; check product-contact parts during keg changes. |
Before you start: depressurize and prepare the system
- Shut off the CO2 and depressurize the system in a controlled manner.
- Disconnect the keg or product supply, and loosen the dispensing head or coupling.
- Prepare the piping route for the rinsing or cleaning device and make it clean and accessible.
- Check in advance which diameters, connections, adapters, and cleaning agents are suitable for the system.
How cleaning works in practice
Cleaning the beer line begins with choosing the appropriate method: light soiling requires something different than biofilm or hard deposits. In practice, several steps are usually combined, such as pre-rinsing, mechanical or chemical cleaning, and then thoroughly rinsing again. Professional beer line cleaning reduces residue and ensures more consistent beer quality.
You can find a supplementary step-by-step explanation for practical execution here: Cleaning a dispensing system correctly.
Rinsing the beer line: water as a pre- and post-rinsing step
Rinsing a beer line is useful as a preliminary step or for rinsing out a cleaning agent. Depending on the system, water is passed through the beer line either directly or via a cleaning container instead of a keg. Rinsing alone removes loose residue and is usually not sufficient for heavier deposits.
Working mechanically with foam balls and a cleaning device
When cleaning a beer line with foam balls, suitable cleaning bodies are moved through the line using a cleaning device. Whether foam balls, beer line cleaning balls, or cleaning sponges are used: the size and material must match the line diameter. Mechanical cleaning is useful for regular maintenance and complements rinsing or chemical cleaning steps well.
Chemical cleaning for heavier deposits and biofilm
For heavier deposits or biofilm, the line is filled with a suitable cleaning solution intended for the beverage sector, often together with connected product-contact parts. Which Thonhauser cleaning agents for beer lines are suitable depends on the type of deposit, material, and manufacturer specifications. Dosage, contact time, and the necessary solution change must be followed exactly. If in doubt, a professional company is often the safe choice.
Which agents and aids are really useful
| Aid | Purpose and what to pay attention to |
|---|---|
| Beer line cleaner / cleaning agent for beer lines | For deposits; choose an acidic or alkaline type suitable for the application. |
| Cleaning device for beer lines | Moves water, sponges, or solution through the line in a controlled manner. |
| Cleaning container | Stores water or cleaning solution, often instead of a keg. |
| Foam balls, cleaning balls, or cleaning sponges for beer lines | For mechanical cleaning; choose a size suitable for the inner diameter. |
| Hoses and adapters | For tight connections; check the connection type and material compatibility. |
If you are unsure about the diameter, connections, or the appropriate combination, Meyer-Roxlau & Trautmann assists in selecting suitable beer lines and components for home use and the catering industry.
Parts in the beer line that are often overlooked
- Dispensing head and fitting: consistently remove residue and moisture.
- Couplings, connectors, and seal areas: clean them along with the lines so that clean lines are not immediately contaminated again.
- Tap and the final product paths at the outlet: pay particular attention to them during keg changes and disinfect appropriately if necessary.
More detailed information on targeted cleaning can be found in Cleaning dispensing systems and taps.
Clean it yourself or hire a professional company?
Cleaning a beer line yourself is practical if the system is manageable, a clear cleaning plan is available, and the appropriate cleaning equipment for dispensing systems is used safely. A professional company is often the better choice for long or branched lines, recurring quality problems, or uncertainty about using chemicals. Important: A complete dispensing system cleaning can involve more than just the beer line.
What costs you should expect
| Cost drivers | Why the effort varies |
|---|---|
| System size and number of lines | More piping routes and connections mean more time and material. |
| Degree of soiling | Stubborn deposits increase the amount of cleaning agents and labor required. |
| In-house cleaning | Cleaning agents, sponges, water, labor time, and documentation are required. |
| External cleaning service | System complexity and scope of service determine the price. |
Flat-rate fixed prices are therefore not very informative. How much cleaning a dispensing system costs depends heavily on the specific system and the desired scope of service.
Which requirements and records are relevant in the workplace
- Hygiene plan and HACCP: Cleaning should be anchored in the workplace as a fixed, traceable process.
- Practical guidelines such as DIN 6650-6: They serve as guidance for cleaning and operation, but do not replace an assessment of your specific case.
- Cleaning record for beer lines: record the date, system or line, cleaning agent used, dosage or concentration, person carrying out the cleaning, any abnormalities, and the result.
Common follow-up questions about taps and bottles
These questions are often confused with beer line cleaning. Although they concern the beer line or adjacent cleaning topics, they sometimes follow their own rules.
How do I clean a brass tap?
Clean a brass tap gently on the material with a suitable, material-compatible agent and water, inside and out. Beer residue should be completely dissolved and then thoroughly rinsed out; in the workplace, suitable disinfection may also be necessary. Only disassemble the tap as far as the design and manufacturer's instructions allow.
How do I clean beer bottles?
Cleaning beer bottles is a separate process and is not equivalent to beer line cleaning. Bottles have their own cleaning and, depending on use, disinfection steps; line cleaners and procedures cannot automatically be applied.
