Dupont brewery

The brewery's copper boiling kettles date from the 1920s, but there are also a number of pieces of modern equipment in use in the brewhouse. Square, flat-bottomed fermentation tanks of stainless steel are utilized to provide specific flavor characteristics that are evident in the finished beer. Primary fermentation lasts about 5 days, followed by a 1-2 week secondary fermentation. After this, the beer is packaged and warm-aged at the brewery for 6–8 weeks at 73 °F (23 °C). All of Dupont's beers are naturally carbonated via bottle conditioning.

The distinctive Dupont house yeast strain has been the subject of much speculation and discussion. The complexity of flavors it generates has caused some to suggest that in fact a combination of multiple strains are used, and its good performance at high temperatures and signature spiciness have led some to conjecture that it was originally a red wine strain that has been adapted to beer fermentation. While most ales are fermented at temperatures not exceeding 68–72 °F (20–22 °C), the tanks at Dupont have been observed to have reached the mid-90s(32 °C+).