The FermTank - 4 Gallon Small Batch Fermenter with Drain Valve


Restock expected Spring / Early Summer of 2024

Compact 4 gallon fermenter with drain valve, thermowell, racking arm, and pressure transfer capabilities. Ideal for brewing beer, wine, kombucha, and more.

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4 Gallon Small Batch Fermenter with Drain Valve for Easy Transfers and Clean-Up

A compact powerhouse designed for the small-batch brewer. 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.


  • Fermtank 4 Gallon Conical
  • Domed Lid and Lid Gasket
  • 5/16" Hose Barb
  • Stainless Plug ( for lid )
  • Air Lock Grommet
  • Thermowell and Thermometer Adapter
  • Digital Thermometer
  • Racking Valve w/ 3/8" Hose Barb and Rotatable Racking Arm
  • Welded Botttom Dump Tube w/ 3/4" GHT threads
  • 3/4" GHT Ball Valve
  • Extendable Legs
  • Swag

4 Gallon Homebrewing Fermenter Features:

  • 4 gallon capacity / roughly 5 gallons at rim
  • Drain valve included at the bottom
  • Thermowell located at the 1.5-gallon mark
  • Can be pressurized to 1-2 PSI for pressure transfers
  • Gasketed lid secured with locking clamps for an air-tight fit
  • Domed lid with hose barb blow off and 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
  • Etched Volume Markings starting at 7 Liters / 2 Gallons and goes to 15 Liters / 4 Gallons
  • Chilling Coil ( not included ) extends below the 1-gallon mark