Description
Fermenter King Junior 20L – pressure fermenter and keg in one
The Fermenter King Junior from Keg King is a compact, affordable PET pressure fermenter. You can ferment, carbonate and serve beer from one and the same tank.
The tank is made of clear, pressure-rated PET, the same material used in the Fermenter King Pressure Fermenter series. The transparent tank makes it easy to follow the fermentation. Pressure fermentation gives a cleaner yeast profile, faster maturation and natural carbonation.
After fermentation you can carbonate the beer directly in the tank and connect it straight to your dispensing system or a handheld tap. You can also transfer finished, carbonated beer to kegs, mini kegs or growlers. To control the pressure during fermentation you need a spunding valve, sold separately.
The Fermenter King Junior is a flexible option for homebrewers who want to try pressure fermentation without investing in stainless steel.
Fermenter King Junior and Fresh Wort Kits
As a keg, the Fermenter King Junior 20L is a good match for a Fresh Wort Kit. After fermentation you normally end up with about 18 litres of finished beer, because the rest is lost with trub and yeast sediment, which should not be transferred to the keg. As a fermenter for a Fresh Wort Kit it is too small, since the kit is 20 litres.
Advantages
- Ferment under pressure for cleaner flavour and faster finished beer
- Carbonate directly in the tank
- Serve straight from the fermenter
- Easy transfer to kegs or growlers
- Clear PET, so you can watch the fermentation
- Affordable entry into pressure fermentation
Specifications
- Capacity: 20 litres (recommended max approx. 18 litres plus headspace)
- Material: pressure-rated PET
- Width: 259.4 mm
- Height: 586.9 mm (to the top of the posts on the lid)
- PRV: 25 PSI (newer models come with a white valve)
Good to know
- A spunding valve is needed to control fermentation pressure
- Use a phosphoric acid-based sanitizer with pH 2.2–2.8
- Avoid cleaning liquids above 40 °C
- PET can deform permanently above 50 °C
Frequently asked questions about the Fermenter King Junior 20L
How much beer can I ferment in the tank?
The tank holds 20 litres, but the recommended maximum is approx. 18 litres, to leave headspace above the beer.
Is the tank suitable for a Fresh Wort Kit?
Yes, as a keg for the finished beer. A Fresh Wort Kit normally gives about 18 litres of beer after fermentation, because trub and yeast sediment stay behind in the fermenter. For fermenting the 20 litres of wort itself, the tank is too small.
Do I need a spunding valve?
Yes, to control the pressure during fermentation. It is sold separately. Many brewers ferment the first couple of days without pressure and then hold around 0.7–1 bar.
What pressure can the tank handle?
The pressure relief valve (PRV) is rated at 25 PSI, which is approx. 1.7 bar.
How do I clean the tank?
Use cleaning liquids below 40 °C, as PET can deform permanently above 50 °C. For sanitizing, use a phosphoric acid-based sanitizer with pH 2.2–2.8.
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