Slideshow: Behind the Scenes at 21st Amendment Brewery with Shaun O'Sullivan

Stealing a Taste
Stealing a Taste
21st Amendment's Shaun O'Sullivan steals a taste of beer directly from one of the fermenting tanks.
The Brewing System
The Brewing System
In the brewpub, 21st Amendment uses a 12-barrel brewing system made by Specific Mechanical Systems. They produce about 800 barrels of beer each year on site.
The Fermenters
The Fermenters
Looking down on two of 21st Amendment's 12-barrel fermenters makes clear how little space they have for on-site brewing. This explains why they had to look to another brewery when they wanted to increase production and begin using a canning line.
Opening Day IPA
Opening Day IPA
21st Amendment credits its proximity to AT&T Park, where the Giants play baseball, as integral to its success. Several of the beers waiting in the fermenting tanks during our visit celebrated the 2010 World Series Champions.
A HQT (Heket) of a Beer
A HQT (Heket) of a Beer
This beer, called a HQT, is based on a recipe from ancient Egypt. It contains no hops, and was brewed using Emmer wheat, a variety of herbs, and two types of honey. 21st Amendment's Head Brewer, David "Zambo" Zamborski, even experimented with growing the malt for this beer on the roof of the 21st Amendment building until their landlord vetoed this. The beer, which has a pleasant viscosity on the tongue, won a gold medal at the Great American Beer Festival.
Amber Waves
Amber Waves
Amber Waves, an amber ale, claimed 21st Amendment's second gold medal at the Great American Beer Festival. The beer contains five different caramel malts and offers nice citrus notes in the finish.