Restaurants in the U.S. have begun pouring wine via draft, and their choices for kegged wine have become much better than generic ‘red’ or ‘white.’
Here’s how it works.
Wine on tap flows through a 304 grade stainless draft system —very similar to that used for beer— pushed out of kegs using a blended mixture of gasses, usually 75% nitrogen and 25% carbon dioxide. This blend preserves wine quality and freshness….
Source : https://www.flickr.com/photos/cizauskas/21009917565/in/[email protected]