18 March Review by The Ranting Chef Categories:Uncategorized Robert Scott Last week we had another review about the GrowlTap! Be sure to check it out. Author: Robert Scott One Comment MikeReply July 15, 2015 at 3:43 pm You’ve mentioned in the comments that the relief valve is set too low to carbonate beer. To what PSI is the relief valve pressure set? Is the pressure adjustable? thank you! Leave a Reply Cancel reply Your message*You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>Name* Email* Url Save my name, email, and website in this browser for the next time I comment.