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/* The Gott Beverage Mash Tun */
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[[image:Mash_tun.jpg|right|thumb|Mash Tun]]A '''mash tun''' (pronounced as ''mash ton'')is a vessel used in the [[Mashing|mashing process]] to convert the starches in crushed grains into sugars for fermentation. Most mash tuns are insulated to maintain a constant temperature and most have a false bottom and spigot so that the ''sparging process'' can be done in the same vessel.
===The Gott Beverage Mash Tun===
[[image:False_bottom.jpg|right|thumb|False bottom inside a mash cooler]]
Arguably the most popular mash tun in use by homebrewers is a converted 5 gallon or 10 gallon ''Gott-style''' drink cooler. Gott is the Rubbermaid brand name, but there are many others who make the same style of drink cooler. This is a cylindrical, insulated drink cooler of the style you often see poured over the heads of coaches at the end of US football games. The original cooler has a valve at the bottom for pouring the drinks out. This type of cooler is ideal for ''infusion mashing'' where hot water is added to the grains, and the cooler is then sealed to maintain a constant temperature during the conversion process. A cooler will typically only lose a degree or two (F) during the hour long mashing process. The simplicity of infusion mashing in a Gott cooler makes it a favorite with brewers.
To convert a cooler for use in brewing, one removes the valve at the bottom by unscrewing it. Next you will need a false bottom, which is nothing more than some kind of screen to hold the grains in place and still allow liquid to flow out during sparging. A popular item is Phil's Phalse Bottom - available from most homebrew shops in various sizes- which is a plastic circular screen that is slightly domed with a threaded elbow in the middle to allow the sweet liquid to flow. Run some appropriately sized host hose from the false bottom, through a stopper sized for the hole made by your old valve, and out the bottom of the cooler. As long as everything is tightly sealed, you should be done.
===Rectangular Coolers===
