Napa Fermentation Supplies is a family business that has been serving the regional wine and beer community since 1983. It is a 7,000-square-foot facility that has tools and supplies for large-scale wineries, as well as home wine makers and brewers. In addition to selling a wide variety of equipment, the store also offers wine-making and brewing classes. It sells and rents Karcher pressure washers and has a full-time Karcher technician available.