ArticleInsulation for Single Vessel Brewing What’s the best way to hold a consistent mash temperature for brew-in-a-bag brewing? We put the popular Reflectix insulation to the test.Already a member? Log InWritten by Rob FrieselYou'll Also Like Article MEMBERS ONLY The Role of pH in Brewing pH plays a role in every step of the brewing process — from the time you mash in, all the way through to the final beer that fills the glass. Take a closer look at pH throughout the brewing process. Article FREE BIAB: Tips From the Pros Brew-in-a-bag (BIAB) continues to grow in popularity around the world. Learn from two brewers well versed in maximizing the BIAB experience.