Which of the following is NOT a type of faucet used in draft systems?

The chosen answer identifies "Carbon faucet" as the option that is not a recognized type of faucet used in draft beer systems. In the realm of draft systems, faucets play a crucial role in dispensing beer, and they vary in design and function.

Regular faucets are the standard choice found in most systems, known for their simplicity and reliability. Perlick faucets, on the other hand, are innovative designs that prevent beer from being trapped in the faucet, reducing waste and ensuring better quality pours. Nitro faucets are used specifically for serving nitro beers, which require a different gas mixture for dispensing, often yielding a creamy texture.

The term "Carbon faucet" does not correspond to any standard or commonly accepted classification within draft systems. While carbon dioxide is indeed used in the carbonation and serving processes of many beers, the faucets themselves are designated by their operational mechanics rather than the gas they utilize. Therefore, it is correct to conclude that "Carbon faucet" does not represent a type of faucet utilized in draft beer dispensing systems.