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KegLand FermZilla All Rounder 30L PET Fermenter
Review · KegLand

KegLand FermZilla review

A clear PET fermenter that can ferment, carbonate and serve under pressure, read from KegLand's user guide, its warnings page and the listings.

Our verdict

The FermZilla All Rounder 30L is an affordable way into pressure fermenting and closed transfers, but only if you treat KegLand's limits as hard rules: 35 psi maximum, a spunding valve whenever it's under pressure, and no warm liquids or direct sun.

The All Rounder is a 30-liter (7.9 gal) PET vessel with a wide 4.75-inch lid that can run as an ordinary airlocked fermenter or as a pressure vessel. Under a little pressure you can ferment warmer with fewer esters, carbonate in the fermenter, and push beer into a keg without letting oxygen in. KegLand says PET is a better oxygen barrier than the HDPE used in common buckets.

The pressure is the catch. KegLand's user guide sets a hard limit of 2.5 bar (35 psi), recommends 10–12 psi for pressure fermenting, and says a spunding valve must always be connected when it's under pressure. The base listing tells you almost nothing about what's in the box, so check before you buy.

Volume
30 L (7.9 gal)
Material
PET
Type
Pressure fermenter
Check it on Amazon All specs

Updated November 2026 · Based on maker specs, the manual, the listing and published sources; we did not brew with it

The short version
  • 30 L (7.9 gal) PET fermenter with a 4.75 in. lid opening, per the pressure kit listing.
  • Hard limit: 2.5 bar (35 psi), per KegLand. The lid carries a red 35 psi PRV. Listings round 2.5 bar to 36.2 psi; follow the manual.
  • KegLand recommends 10–12 psi for pressure fermenting, with a spunding valve always connected. A PRV alone isn't enough.
  • Temperature limits: no liquids above 131°F (55°C), and nothing above 95°F (35°C) under pressure.
  • If you ferment under pressure, hydro test it every 24 months, and after any damage, per KegLand.

This FermZilla review covers KegLand's All Rounder 30L, the PET fermenter shaped like a large soda bottle. KegLand sells it bare and in kits. The kits add a stand, a handle, carbonation caps for gas and liquid connections, a floating dip tube and a BlowTie spunding valve. With those parts it becomes a unitank: you ferment, carbonate and serve or transfer from the same vessel.

We read KegLand's user guide and warnings, the listings and published brewing sources. We did not ferment in or pressure-test a FermZilla. For other fermenters, see the fermenters and temperature control hub and the switching to kegs page.

Who it’s for, and who should skip it

Good fit if you…
  • Keg your beer and want closed, low-oxygen transfers from fermenter to keg
  • Want to try pressure fermenting to ferment warmer with cleaner results
  • Like seeing the beer through a clear fermenter
  • Want a lighter alternative to glass or stainless
Skip it if you…
  • Ferment in direct sun or a garage that gets above 95°F in summer
  • Want to clean with hot water or leave cleaners soaking for hours
  • Don't want to buy and fit a spunding valve and the right connections
  • Want a cone and a dump valve for yeast harvesting (look at the Tri-Conical 27L)

Pros and cons

What stands out
  • Rated to 2.5 bar (35 psi) with a pressure-relief valve in the lid
  • PET is a better oxygen barrier than HDPE buckets, per KegLand
  • Clear body shows krausen and sediment
  • Wide 4.75 in. lid opening for cleaning and dry hopping
  • Can ferment, carbonate and serve from one vessel with the right kit
  • Light and shatter-resistant compared with glass
Keep in mind
  • Base listing gives almost no detail on what's included
  • Needs a spunding valve and gas/liquid connections for pressure work
  • No liquids above 131°F, and nothing above 95°F under pressure
  • Needs a hydro test every 24 months if used under pressure
  • Keep out of sun and UV; cleaners only from KegLand's approved list

Specs

TypePressure fermenter
Volume30 L (7.9 gal)
MaterialPET

As stated by the maker or seller; confirm on the listing before you buy.

What pressure is the FermZilla rated for?

KegLand's warnings page is plain: never apply more than 2.5 bar (35 psi). The lid has a red 35 psi pressure-relief valve, and KegLand says to use only its red or yellow PRV and never tamper with it. Listings often convert 2.5 bar to 36.2 psi, and KegLand's user guide elsewhere says it can ferment at up to 2.4 bar. Follow the manual: 35 psi is the ceiling, and 10–12 psi is the recommended pressure for fermenting.

Never connect an unregulated CO2 source. KegLand says any external gas source needs its own PRV set at or below 35 psi. If krausen or wort reaches the PRV, vent the vessel, then remove and clean the valve before you pressurize again. Always vent all pressure before you loosen the lid ring.

FermZilla All Rounder 30L limits from KegLand

LimitFigureSource
Maximum pressure2.5 bar (35 psi); never exceedKegLand warnings
Pressure fermenting10–12 psi recommendedKegLand warnings
Lid PRVRed, 35 psiKegLand kit contents
Spunding valveMust be connected and set below 35 psi when under pressureKegLand warnings
Liquids, no pressureBelow 131°F (55°C)KegLand warnings
Temperature under pressureNot above 95°F (35°C)KegLand warnings
Leak testEmpty, 15–35 psi, before each fermentationKegLand user guide
Hydro testEvery 24 months if used under pressureKegLand warnings

Source: KegLand: FermZilla All Rounder 30L and 60L user guide

CO2 cylinders and pressureKeep cylinders upright and secured, and always use a CO2-rated regulator (US CO2 tanks use the CGA 320 valve fitting); never connect a cylinder straight to a keg. Store tanks cool and away from heat. CO2 displaces oxygen and collects low: ventilate, close the tank valve and leave the room if a tank leaks. Never exceed a fermenter’s or keg’s rated pressure.Source: Kegco: Everything you need to know about CO2; OSHA hazard bulletin on CO2

Do you need a spunding valve?

Yes, for any pressure work. Fermentation keeps making CO2, and without a way to vent it the pressure keeps climbing. KegLand says a PRV alone is not enough: a spunding valve set below 35 psi must always be connected when fermenting under pressure, and on the receiving keg during a closed transfer. The spunding valve holds the pressure you choose and releases the rest.

Stainless conical fermenters on a platform in a small brewery
Pressure-rated fermenters can be spunded to carbonate.Photo: Stephen Craven, CC BY-SA 2.0, via Wikimedia Commons

KegLand's kits include its BlowTie spunding valve; the 30L Easy-Grip starter kit lists a BlowTie with a 0–15 psi gauge. The bare fermenter listing doesn't say, so plan to buy one if it isn't in your box.

What's in the box: bare fermenter vs kits

The base listing (B08WGR79MP) describes a 30 L PET fermenter that can ferment under pressure, and little else. KegLand's own kit list shows how much the contents vary:

  • Starter kit with handle: tank, stainless stand and handle, threaded lid ring, pressure lid with red 35 psi PRV, grommet cap, three-piece airlock, strip thermometer, graduation sticker.
  • Complete pressure brewing kit: the starter kit plus gas and liquid carbonation caps, a stainless float with silicone dip tube and filter, a BlowTie spunding valve kit and a gas ball lock disconnect.
  • Easy-Grip pressure starter kit: tank, Easy-Grip lid, 35 psi PRV, carbonation caps, floating dip tube and a BlowTie with a 0–15 psi gauge.

Check which version a listing ships before you buy. If you want a cone and a 3-inch dump valve to collect yeast, the Tri-Conical 27L Gen3 is designed to ferment at up to 2.4 bar and includes a 600 mL collection container, per its listing.

Temperature, cleaning and care

PET softens with heat. KegLand says never to put liquids above 131°F (55°C) in it, and never to expose it to more than 95°F (35°C) while it's under pressure. That rules out hot-water rinses and sunny garage windows. If you use a heat belt, KegLand says to keep it below the liquid level and run it only through a temperature controller; our Inkbird ITC-308 review covers one.

Clean and sanitize with cold water and only the chemicals KegLand approves, and don't leave PBW-type cleaner in it longer than 30 minutes. Keep it out of direct sun and UV, lubricate the O-rings with food-grade lubricant, don't overtighten caps or handles, and avoid lifting it when full. If it's scratched, dropped or stressed, KegLand says not to use it under pressure until it has been hydro tested.

Chemicals: label directions onlyUse sanitizers, cleaners, acids and salts only at the dilution and contact time on the label. Wear eye protection with acids and powders, add acid to water, keep them away from children and food prep. Star San is EPA-registered (Reg. No. 65001-1) as a no-rinse sanitizer at label dilution.Source: EPA Star San label

Carbonating and serving from the FermZilla

Once fermentation ends, you can raise the pressure to carbonate, within the 35 psi limit, then serve straight from the liquid post or push the beer into a keg through a closed transfer. Use the keg carbonation chart to pick a pressure for your temperature and target CO2 volumes, and log readings in the brew-day log. A floating hydrometer such as the Tilt reads well through PET; see our Tilt review.

Keg carbonation chart and PSI calculatorPick a carbonation pressure that stays well inside the FermZilla's 35 psi limit.

Our best pressure fermenters and best conical fermenters lists compare the FermZilla with stainless options.

Close-up of creamy krausen on actively fermenting beer
Close-up of creamy krausen on actively fermenting beerPhoto: Chiliberto, CC BY 2.0, via Flickr

Alternatives worth a look

PET without pressure: A 6-gallon wide-mouth PET carboy with a drilled lid, for brewers who want PET but don't plan to ferment under pressure.

Stainless bucket: Ss Brewtech's 7-gallon stainless Brew Bucket, which tolerates hot cleaning; check the maker's spec sheet, as the listing gives few details.

Stainless with pressure: VEVOR's 30 L stainless conical with pressure monitoring rated to 15 psi and a built-in thermometer; a yeast collection bottle is not included.

How we reviewed it

We read the maker’s specs, the manual and the current listing, and checked them against published brewing sources (Palmer, BJCP, AHA, BYO) and safety guidance where it applies. We did not brew with, install or lab-test this product. We never show scores, star ratings or prices.

Questions

What pressure can a FermZilla handle?
KegLand sets the maximum at 2.5 bar (35 psi) and says never to exceed it. It recommends 10–12 psi for pressure fermenting.
Do I need a spunding valve with a FermZilla?
Yes, whenever it's under pressure. KegLand says a spunding valve set below 35 psi must always be connected; the PRV alone is not enough.
Can you put hot wort in a FermZilla?
No. KegLand says never to put liquids above 131°F (55°C) in it, and nothing above 95°F (35°C) while it's under pressure.
What is the difference between the FermZilla All Rounder and Tri-Conical?
The All Rounder is a flat-bottom PET vessel rated to 2.5 bar. The Tri-Conical 27L Gen3 has a cone, a 3-inch butterfly dump valve and a 600 mL collection jar for yeast, and is designed for up to 2.4 bar.
How often should a FermZilla be hydro tested?
Every 24 months if you ferment under pressure, and after any scratch, drop or stress, per KegLand.
Is pressure fermenting worth it?
It lets you ferment warmer with fewer esters, carbonate in the fermenter and transfer to kegs without oxygen. It also adds parts and safety rules, so start with KegLand's recommended 10–12 psi.

Sources

  1. KegLand: FermZilla All Rounder 30L and 60L user guide, important information and warnings
  2. KegLand: FermZilla All Rounder user guide, what's included
  3. KegLand: FermZilla 30L All Rounder product page
  4. KegLand: FermZilla All Rounder starter kit instruction manual (PDF)
  5. Kegco: Everything you need to know about CO2