False Bottom for the 15 Gallon Mash Lauter Tun (13.875" in Diameter)MiniMash Tun 15 False Bottom (Plastic Filter Screen) The false bottom is the filter screen that sits on the internal ledge near the bottom of the MiniMash Tun 15. It separates grain husks and solids from the wort during lautering for a cleaner runoff. Supports wort filtration by holding back grain and debris Center support leg helps prevent flexing under heavy grain bills Bolted to the center leg so it stays in place and wont float