Fermenter King Junior 20L

Fermenter King Junior 20L - Pressure Fermenter

20L Fermenter King Junior Unitank

The Fermenter King Junior is the most affordable 20L P.E.T unitank on the market.

Allowing the average home brewer the ability to ferment, carbonate and dispense their beer in a single vessel.

This pressure fermenter is perfect for fresh wort or brewing kits, the easiest way to brew good beer.


  • Same tank mould as the Fermenter King Kegs.
  • Utilises the same clear PET material of the 30L and 60L Unitanks.
  • Minimise oxidisation through pressure fermentation.
  • Full Pressure fermenting capabilities - just attach a spunding valve to the gas post to get started.

What are the benefits of fermenting under pressure?

  • Overall reduction in yeast ester and fusel production.
  • Ferment at higher temperatures without producing off-flavours.
  • Naturally carbonated beer from CO2 generated during fermentation (Rather than waiting over another week for carbonation)
  • Due to the closed fermentation, aroma compounds remain in the beer and aren’t blown off.
  • You can serve beer directly from uni tanks, counter pressure fill bottles or easily transfer the beer into kegs using pressure.
  • Fantastic for fermenting lagers with the lower ester production and the ability to brew at 21°C to obtain a traditional lager flavour.


  • Pressure Lid fitted with PRV rated to 2.4BAR (35PSI)
  • Crystal Clear PET Tank.
  • Stainless Steel Ball Lock Gas and Liquid Post
  • Silicone Dip Tube with Stainless Steel Float Ball.


  • 259.4mm wide at the base.
  • 586.9mm height to the top of the posts.

Attach this fermenter to your tap system or any handheld tap and serve directly out of the fermenter.

A spunding valve will be required to control the internal pressure of the fermenter.

Click here for detailed instructions.

Keg King

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