Draft Beer Systems
Beer Line Cleaning Equipment

Why Must Draft Lines Be Cleaned Regularly? Unveiling the Essentials for Pristine Beer Quality

January 1, 2024
Why Must Draft Lines Be Cleaned Regularly? Unveiling the Essentials for Pristine Beer Quality

Wondering why must draft lines be cleaned regularly? It’s not just about the beer’s flavor—unclean lines can threaten your health and undermine your brewing investment. Regular cleaning eliminates the buildup that sours your beer and harbors bacteria. This article dives into the significance of this routine maintenance, giving you practical insights into how and when to clean, and what happens when you don’t. Ready to ensure your beer remains true to its crafted taste and quality? Keep reading.

Key Takeaways

  • Regular cleaning of draft lines is crucial to prevent microbial contamination, and beer stone build-up, and to maintain the beer’s ideal flavor and aroma.
  • The cleaning process involves the use of specialized chemical solutions to eliminate contaminants, inhibit off-flavors, and maintain the quality and freshness of the beer.
  • Clean beer lines are key to customer satisfaction, repeat business, and the efficiency and longevity of the draft system, with industry standards recommending cleaning every two weeks.

The Essence of Regular Draft Line Maintenance

Like arteries carrying lifeblood, beer lines transport the golden brew from the keg to your glass. Just as unhealthy arteries can lead to heart issues, unclean beer lines can spoil the taste of your beer, degrade its quality, and in some cases, even pose health risks. Maintaining these lines regularly is necessary for optimal beer taste and safety.

Beer line cleaning entails the removal of microbial contaminants, preventing beer stone accumulation, and preserving the beer’s ideal flavor and aroma. If not maintained and cleaned properly, the buildup from yeast, proteins, minerals, and other substances can lead to off-flavors and compromise the quality of your beer experience.

Draft Beer Line Cleaning

The Battle Against Microbial Contaminants

In the world of draft beer, we are constantly at war with an invisible enemy - microbial contaminants. These include yeast, bacteria, and mold, which thrive in the confines of beer lines. If left unchecked, these unwanted guests can ruin the taste of beer and compromise the draft system.

To keep these microbial misfits in check and maintain system efficiency and hygiene, beer lines, faucets, keg couplers, and other components must be cleaned regularly.

Preventing Beer Stone Accumulation

Beer stone, a stubborn deposit that forms in beer lines, is a nuisance for any beer enthusiast. This accumulation is caused by a combination of organic materials like proteins and inorganic substances like oxalates. Regular cleaning of beer lines helps prevent off-flavors and ensures a consistent and satisfying beer experience, while also reducing the buildup of beer stones.

Beer stone not only affects the taste and aroma of your beer but also creates a surface that can harbor microorganisms, leading to an unsanitary environment. A regular cleaning regimen can help prevent these issues. Here are some steps to follow:

Beer Stone Residue
  1. Flush the system with fresh water after using a cleaning solution to ensure that no residue is left behind.
  2. Use a cleaning solution specifically designed to remove beer stones. This requires an Acid Cleaning.
  3. Scrub the affected areas with a brush or sponge to remove any buildup.
  4. Rinse the system thoroughly with fresh water to remove any remaining cleaning solution.
  5. Repeat this cleaning process regularly to maintain a clean and sanitary environment.

By following these steps, you can preserve the beer’s appearance, aroma, and flavor, which can improve beer service and increase customer satisfaction.

Ensuring Consistent Beer Quality

Providing a consistently high-quality craft beer experience is a commitment that every brewery should stand by. Maintaining clean draft lines regularly is key to upholding this commitment. From preserving the intended flavor profile to maintaining the right temperature and pressure control in the draft system, regular cleaning and maintenance are the unsung heroes behind every perfectly brewed pint.

Transparency in cleaning practices can also help breweries showcase their commitment to beer quality. Breweries can demonstrate their commitment to offering the freshest beer by making the last cleaning date of their draft systems public. After all, the journey of a quality beer doesn’t end at brewing. It’s the clean lines that deliver the perfect pint into the customer’s hands.

The Science Behind Clean Beer Lines

Cleaning Beer Lines

Behind every clean draft line, there’s an unseen world of chemistry at work. The science behind clean beer lines involves using a combination of sanitation and cleaning chemicals. Powerful caustic chemicals work diligently to break down biofilms, while balanced surfactant packages help maintain overall beer quality and prevent biofilm formation.

But, not all that glitters is gold! Various chemical elements such as ions, detergents, and enzymes can interact with contaminants like diacetyl and acetic acid/acetaldehyde in the beer line. These unwanted guests, along with yeast and bacteria, can contribute to off-flavors, while beer stone can lead to reactions that negatively alter taste and aroma.

Hence, grasping this chemistry is necessary for maintaining a high-quality draft system.

Dirty Beer Lines filled with Beer Stone

Chemistry of a Clean Beer Line

The cleaning solution is the magic potion in the beer line cleaning process. It works efficiently to:

  • Eliminate contaminants
  • Inhibit the development of off-flavors in beer
  • Prevent the regrowth of spoilage communities
  • Maintain the quality and taste of the beer

The choice of cleaning solution is equally important. Commonly used in the industry, a standard beer line cleaning solution might contain sodium hydroxide (NaOH) or potassium hydroxide (KOH). Acids and bases are often used as cleaning chemicals due to their effectiveness in removing organic and inorganic deposits. Nevertheless, using the right cleaning solution with the correct frequency, strength, and temperature is key to preventing off-flavors in beer.

The Flavor Experience and Off Flavors

Just like a symphony gone wrong, off-flavors can ruin the entire beer experience. These flavors can be a result of microbial contaminants and beer stone accumulation. Microorganisms change beer flavor through the production of metabolites and other associated by-products. Beer stone accumulation, on the other hand, has several negative effects on the beer, including causing off flavors, reducing its shelf life, and creating an unsanitary surface that can harbor microorganisms.

Clean Beer Lines are free of Off Flavored Beer. Giving the Customer Brewer intended beer.

Off flavors in beer can have a significant impact on the overall beer-tasting experience as they introduce undesirable tastes or aromas that deviate from the intended flavor profile of the beer. These off-flavors can affect the mouthfeel and odor of the beer, leading to a negative perception of the beer.

Hence, regular cleaning is necessary to ward off these unpleasant flavors and ensure a pleasing flavor experience for all beer enthusiasts.

Practical Benefits of Clean Draft Lines

Practical Benefits of Clean Draft Lines

While the process of cleaning beer lines might seem mundane, the benefits it brings are far from it. Clean draft lines contribute to customer satisfaction, repeat business, and the efficiency and longevity of your draft system.

A clean beer line:

  • Allows the beer to flow smoothly and maintain its true essence
  • Ensures fresher beer and higher check averages
  • Guarantees a consistent beer experience in appearance, aroma, and flavor
  • Enhances customer experience and satisfaction
  • Plays a key role in encouraging customers to return
Clean beer lines help Breweries serve clean beer to customers.

Customer Satisfaction and Repeat Business

The saying “The customer is always right” holds true even in the world of beers. The quality of beer directly impacts customer satisfaction. Regular beer line cleaning ensures that customers receive a consistent quality and sensory properties from their chosen beer, leading to increased customer satisfaction.

A satisfied customer is a repeat customer. Meeting customer expectations leads to positive public praise and a higher likelihood of repeat purchases, highlighting the financial impact of satisfying customers. Excellent customer service and engagement, coupled with the quality of beer, can encourage customers to frequent a business more often.

Because at the end of the day, a happy customer is the best business strategy.

Efficiency and Longevity of Your Draft System

The benefits of clean draft lines extend beyond the beer and the customers; they also impact the efficiency and longevity of your draft system. Cleaning beer lines regularly doesn’t just guarantee the beer’s quality and taste, it also boosts the system’s durability and that of its components like couplers, faucets, and shanks.

Maintaining clean draft lines is crucial for upholding the beer’s quality and preventing contaminants from affecting the taste and reputation of the beer. This care helps to:

  • Extend the lifespan of components like trunk lines and faucets
  • Ensure that the beer’s desired taste is preserved
  • Ultimately lead to time and cost savings in the long run.

Cleaning Techniques for Pristine Draft Lines

Using Recirculating Pumps to Clean Draft Beer Lines

Choosing the right cleaning technique is as important as the cleaning process itself. It involves selecting the right beer line cleaner and establishing a routine cleaning schedule.

Whether you’re a homebrewer or a commercial brewery, selecting the right cleaner for your beer line can make a big difference in the effectiveness of your cleaning process. Similarly, understanding the difference between routine cleaning and deep cleaning schedules can help you plan your maintenance efficiently.

Choosing the Right Beer Line Cleaner

Given the wide range of cleaning solutions available on the market, selecting the right one for your beer line may seem overwhelming. The right cleaning solution for your draft system is essential as it ensures effective cleaning and helps prevent any potential damage to your equipment.

Commonly used in the industry, a standard beer line cleaning solution might contain sodium hydroxide (NaOH) or potassium hydroxide (KOH). Acids and bases are often used as cleaning chemicals due to their effectiveness in removing organic and inorganic deposits. However, using an incorrect type of beer line cleaner can result in inadequate cleaning or harm to the dispensing system. At Renny's, we choose to use Micromatic and Draftech Line Cleaner

Routine Cleaning vs. Deep Cleaning Schedules

When it comes to cleaning beer lines, frequency matters as much as the method. Establishing a routine cleaning schedule, including both regular and deep cleaning, ensures optimal beer quality and draft system performance.

The industry standard suggests regular cleaning of beer lines every two weeks, while deep cleaning is recommended for commercial environments at least once a quarter. In-home environments, it’s advisable to:

  • Deep clean the beer lines whenever switching to a new type of beer
  • Deep clean the beer lines after a prolonged period of disuse

Remember, a clean line is a lifeline for your draft beer lines’ quality!

Step-by-Step Guide to Cleaning Your Draft Lines

Setting up Recirculating Beer Line Pump to Clean a Beer System

Now that you understand the importance of clean beer lines and the right cleaning techniques, it’s time to roll up your sleeves and get to work on cleaning draft beer lines. Here’s a step-by-step guide to cleaning your draft lines:

  1. Flush Beer out of your beer system with water.
  2. Clean lines with cleaning chemical.
  3. Flush the cleaning chemical from the beer system. Use PH Paper to verify.
  4. Retap the Kegs and Pull beer through the system.
  5. Here's a Video To Watch This Process

Whether you’re a homebrewer or a commercial brewery, this guide will walk you through the process, ensuring that your beer lines are as clean as a whistle and ready to deliver the perfect pint of beer.

1. Flush Beer Out of Your Beer System with Water:

This initial step involves removing any remaining beer from the lines. It's done by flushing the system with water. This process ensures that the lines are free of beer before the cleaning agent is introduced. The water temperature used should be from cool to warm.

2. Clean Lines with Cleaning Chemical:

After flushing out the beer, a specialized beer line cleaning chemical is introduced into the system. This cleaning solution is designed to remove build-ups like yeast, bacteria, and beer stone that can affect the taste and quality of the beer. The cleaning solution should be circulated through the lines for a specified amount of time, usually recommended by the cleaning solution manufacturer, to ensure thorough cleaning.

3. Flush the Cleaning Chemical from the Beer System:

Once the lines have been adequately cleaned, the next step is to flush out the cleaning chemical. This is done using water. It's important to ensure that all traces of the cleaning solution are removed from the lines to prevent any chemical taste in the beer. After flushing, pH paper is used to test the pH level of the water coming out of the system. The pH level should return to a neutral level, similar to the water used for flushing, indicating that the cleaning solution has been completely removed.

4. Retap the Kegs and Pull Beer Through the System:

The final step involves reconnecting the kegs to the system. Once the kegs are tapped, beer is pulled through the system. This action ensures that the lines are now filled with beer and ready for serving. It's also a good practice to discard the first few glasses of beer pulled through the system after cleaning, as they may still contain remnants of water or cleaning solution.

Each of these steps is essential to maintain the hygiene and functionality of a beer dispensing system, ensuring that the quality and flavor of the beer served are optimal.

The Impact of Neglecting Beer Line Cleaning

Just as a small leak can sink a great ship, neglecting beer line cleaning can lead to:

  • off-flavors
  • poor beer quality
  • damage to your draft system
  • ultimately affecting customer satisfaction and business success.

Failing to clean regularly can result in various issues in the draft system, including:

  • Improper temperature regulation, leading to less cold fresh water
  • Incorrect system pressure
  • Compromised faucet operation
  • Foaming issues
  • Yeast and sediment accumulation

All these can adversely affect the served beer’s quality and clarity. Its impact on customer satisfaction can be significant as it compromises the quality and taste of the beer, which are essential for maintaining customer loyalty and repeat business.

Record Keeping and Compliance

Keeping accurate records of your beer line cleaning schedule and adhering to industry standards are necessary to show your commitment to beer quality and customer satisfaction.

According to industry standards, beer lines should be cleaned every two weeks to uphold beer quality and guarantee the safety and satisfaction of customers. Failing to comply with industry standards for beer line cleaning can result in:

  • Legal implications
  • Damage to industry and company reputations
  • Erosion of customer confidence
  • Potential risks to consumer health


In conclusion, maintaining clean beer lines is not just an industry standard, but a commitment to quality, customer satisfaction, and the longevity of your draft system. From preventing microbial contaminants and beer stone accumulation to ensuring consistent beer quality, every aspect of beer line cleaning plays a crucial role in delivering that perfect pint of beer. Whether you’re a homebrewer or run a commercial brewery, understanding the science behind beer lines, choosing the right cleaning solution, and adhering to a regular cleaning schedule can ensure that your beer lines remain as pristine as your brew.

For those of you in Oregon and who need help cleaning beer lines please reach out to us at Renny's. If you have further questions or questions about anything draft-related you can always reach out to us here.


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