What are the four key elements of draft systems?

The four key elements of draft systems consist of components that work together to deliver beer from the keg to the glass in an efficient and effective manner. The correct answer, which includes keg, coupler, FOB (foam on beer) system, and faucet, highlights these crucial elements.

The keg serves as the container for the beer, allowing for storage and transport. The coupler is the device that connects the keg to the draft system and allows for the release of beer when tapped. It plays a vital role in maintaining the integrity and freshness of the beer by ensuring a tight seal and preventing contamination.

The FOB system prevents foam from entering the lines, which helps maintain a proper flow of beer and minimizes waste. This is essential in maintaining the quality and consistency of the pour. Finally, the faucet is the point of dispensing, where the beer is poured into the glass, making it a critical component of the user's experience.

While the other choices mention relevant components of beer service, they do not accurately encompass the essential elements of a draft system. For example, including glass in the system doesn’t reflect the operational aspects of dispensing beer, and ice or cooler may be important for storage but are not integral to the draft beer delivery mechanism itself. The presence of these