Mash Tun

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General Information

Usable by all members

Equipment Owned By CHAOS Members
Model Number Varies
Date of Purchase Varies
Estimated Value Varies

Mash tuns are used to convert grain starches to sugars.  Roasted and high-temp kilned grains are also added for flavor and color during the mashing process.  Adjuncts, such as, rice, corn, and oatmeal can be added for additional fernenting sugars or (oatmeal) body.

Rules and Instructions


Before Usage

  • Clean the mash tun with PBW or other acceptable cleaner. Make sure you open the valve, just in case. Do not use dish soap!
  • Ensure the false bottom, if present, is secured. Loose false bottoms can disconnect during the mash and cause stuck sparges.
  • Once clean, add two gallons of 170 – 200 degree water to the mash tun for 10 minutes. This will condition the mash tun and assist with maintaining the proper temperature during mashing.
  • After conditioning, you are ready for mashing.
  • Time saver: Repurpose your hot water for the carboy cleaner or to use with PBW for other washing needs.

After Usage

  • Empty spent grains into the compost bins. They are located in the parking lot, next to the dumpster. Do not bring the bins inside!
  • Ensure the false bottom, if present, did not become loose and fall into the bin.
  • Thoroughly clean the mash tun with PBW or other acceptable cleaner. Open the valve while cleaning.  Do not use dish soap!
  • Allow the mash tun to dry for a while before hanging.
  • When you leave, hang the mash tun with the valve open.

Service and Upkeep

The following users have knowledge of how to fix this device:

  • Mash tun owners
  • Jeff Whelpley


In the event you have an issue, you might try checking the tubing connections.  If they become loose, a stuck sparge can occur.

if you are using more than two pounds of wheat, add 1/2 pound of rice hulls to prevent a stuck sparge.