The FermTank - 4 Gallon Small Batch Fermenter with Drain Valve

Ideal for small batch brewers, The FermTank - 4 gallon is compact, loaded with features, and ready for whatever you might be brewing. Made out of 304 stainless steel, this fermenter is sanitary, easy to maintain, and versatile. This version of the 4 gallon FermTank comes with an easy-to-use drain valve on the bottom, much like the 8 gallon version.

It has a thermowell and thermometer, rotating racking arm, and blow off barb. The domed lid is pressure transfer ready and has a second port ideal for one of our ball lock gas adapters. Featuring etched volume markings, this fermenter is perfect for beer, wine, cold brewed coffee, kombucha, mead, or whatever else you have in mind.


  • 4 gallon capacity
  • This version includes a drain valve at the bottom
  • Includes thermowell and removable thermometer
  • Pressurizable to 4 PSI for pressure transferring
  • Racking port with rotatable racking arm
  • Gasketed lid with locking clamps for an air-tight fit
  • Domed lid with hose barb blow off. Lid also has an extra port with plug & o-ring.
  • Dimensions without lid: 17" h, 11.25" diameter, 4 gallon volume.
  • Total height with lid and blow off barb: 20" h