Pro protocol: Cleaning and maintenance of beer dispensing lines

1. How often should you clean your draft lines?

In the hospitality sector and in breweries, sanitary recommendations and HACCP procedures impose a strict schedule:

• Every 14 days (Recommended standard): Full alkaline cleaning of all beer lines, keg couplers and faucets.
  
  
• At every keg change for “sensitive” beers: Mandatory when switching from a sour beer (Sour, Lambic), a beer loaded with wild yeasts (Brett) or a heavily hopped beer to a classic Lager, to avoid cross‑contamination.
  
  
• In case of prolonged shutdown (>5 days): Always rinse the lines with clean water, then push cleaner through or purge the lines with CO2 to avoid beer stagnating at room temperature.

2. Why use an alkaline cleaner with colour indicator (Desana‑type)?

In professional environments, Desana Max powder has become the absolute reference for draft system cleaning. Unlike standard liquid caustic, Desana uses a violet active component that changes colour depending on the level of contamination inside the line:

• Yellow / Green colour: The solution is actively reacting with biological matter and organic deposits. The line is still dirty.
  
  
• Stable Violet / Pink colour: The solution no longer encounters any organic matter to break down. The line is perfectly clean and disinfected.

This colour indicator prevents product waste, guarantees hygiene compliance and provides immediate visual validation for the operator.

3. Step‑by‑step cleaning protocol using a cleaning keg

Here is the methodical procedure for cleaning a draft system using a stainless‑steel or reinforced plastic cleaning keg:

1. Prepare the solution:
   Fill the cleaning keg with warm water (30–40°C). Dilute the sachet or dose of alkaline cleaner (Desana) according to the manufacturer’s instructions. Mix until fully dissolved (the solution turns violet).
   
   
2. Purge the beer and pre‑rinse:
   Close the gas supply to the beer keg, disconnect the keg coupler and connect it to the cleaning keg. Open the faucet to purge the remaining beer in the line until the cleaner appears.
   
   
3. Soaking and circulation phase:
   Let the solution act inside the line for 15–20 minutes.
   If the first liquid coming out is yellow/green: Purge another glass of liquid until you obtain a clear violet colour, then let it sit again for 10 minutes.
   
   
4. Mechanical cleaning of service parts:
   During the soaking time, disassemble the faucet (including the compensator) and the keg coupler. Brush internal parts with a dedicated hygiene brush and immerse them in a cleaning solution bath.
   
   
5. Final thorough rinse:
   Empty and rinse the cleaning keg thoroughly. Fill it with clean potable water. Reconnect the line and rinse until the water runs perfectly clear and neutral. Always check the pH at the faucet outlet with pH paper to ensure total absence of alkaline residues before reconnecting the beer keg.

4. Summary table of issues and solutions