Why must draft lines be cleaned regularly?

Draft lines must be cleaned regularly primarily to prevent bacterial infection. Over time, residue from beer, yeast, and other organic materials can accumulate in the lines and tap system. This buildup provides an ideal environment for harmful bacteria and other microbial growth, which can spoil the beer and lead to off-flavors, unpleasant aromas, and potential health risks for consumers. Regular cleaning of the draft lines ensures that the beer served maintains its intended flavor, aroma, and quality, while also safeguarding against contamination.

While enhancing flavor, reducing foam, and maintaining temperature are important aspects of serving beer, they are secondary benefits that can result from the proper maintenance of draft lines. The protection against bacterial infection is the most critical reason for regular cleaning, as it directly relates to the safety and quality of the product served from the draft system.