Chubby Apollo 30L – Pressure Fermenter

Keg King Chubby Apollo 30L Pressure Fermenter

If you've been homebrewing for a while, there's a good chance you've come across the original Chubby fermenter.

It's been a solid go-to for pressure fermentation.

The Chubby Apollo takes that same reliable design and improves it where it matters most — starting with a wider 115mm lid that actually lets you reach in and clean it properly.

It’s still compact and lightweight, but now it’s way easier to handle thanks to the moulded side handles.

Whether you're fermenting under pressure or going the traditional gravity route with an airlock, this tank’s up for the job.

It’s ideal for single 23–25L batches, and unlike some of the flimsier PET fermenters out there, this one's built tough.

If you’re into pressure fermenting lagers at ale temps, or you like the idea of carbonating and serving right from your fermenter, the Apollo has you covered.

What’s the Chubby Apollo Like in Action?

For real-world brewing, the Chubby Apollo hits that balance of simplicity and performance.

It's easy to use, quick to clean, and holds pressure like a champ.

The wide opening alone makes it worth the upgrade if you’ve fought with narrow-lid fermenters before.

Pressure fermentation helps you knock out cleaner beers faster, especially when you’re working with limited temp control.

Suppressed esters, faster timelines, and a beer that's nearly carbonated by the time you’re done — what’s not to like?

And that big lid isn't just good for cleaning.

It gives you room to dry hop, install a thermowell, or run a CIP ball without having to MacGyver anything through tight ports.

You can monitor fermentation visually, swap out fittings easily, and even serve directly from the tank.

It’s just practical gear made for brewers who actually brew.

What You’ll Need to Use It

Whether you’re keeping it simple or fully kitting it out, here’s what you’ll want on hand:

• CO₂ cylinder and regulator
• Spunding valve (or a 10–15 psi PRV — blue or purple)
• Non-caustic sanitiser (like ChemSan or VWP)
• Gas and liquid ball lock disconnects
• Floating dip tube setup (already included)
• Optional: Thermowell, cooling coil, CIP cleaning gear

Key Features

• 115mm wide lid — finally, a fermenter you can clean without contorting
• Built-in carry handles — strong enough to lift even when full
• Crystal-clear PET — lets you keep an eye on fermentation progress
• Pressure ferment, carbonate, and serve from the same vessel
• Floating dip tube setup pulls bright beer from the top
• Compatible with Keg King add-ons: Spundy, thermowell, cooling coil, CIP kits
• Made in Australia from BPA-free PET — not a cheap import
• Individually pressure-tested to ensure reliability

What’s Included

• 30L Chubby Apollo PET tank
• Apollo lid, neck ring, and silicone O-ring
• Gas and liquid ball lock posts (304 stainless steel)
• Universal poppet and spring (x2)
• Short stainless dip tubes with O-rings (x2)
• White 25 psi pressure relief valve (pre-installed)
• PRV housing and O-ring
• Thermowell port cap (removable)
• Silicone dip tube with stainless float
• Stainless steel beer filter
• Stick-on thermometer
• Volume/graduation sticker

Specs & Dimensions

• Capacity: 30L total (ideal for 23–25L batches)
• Material: BPA-free, food-grade PET
• Height: 602mm (to top of posts)
• Width: 300mm diameter
• Weight (empty): Lightweight and easy to move
• Cleaning Access: Wide 115mm opening

Pressure & Ports

• Max Pressure: 2.4 bar / 35 psi (tested to 5 bar)
• Pressure Relief Valve: 25 psi white PRV installed
• Ball Lock Posts: 1 gas, 1 liquid (304 stainless)
• Lid Ports (4 total):
  • Gas post
  • Liquid post
  • Dry-hop / PRV port
  • Thermowell port (capped by default)

Brewer’s Tip: Avoid Scratched Plastic, It’s a Sneaky Infection Risk

One mistake a lot of brewers make with PET fermenters: cleaning with the wrong stuff.

Even a tiny scratch can harbour bacteria and wild yeast, and once it’s in there, it’s tough to get out.

Stick to soft sponges, no steel wool, and definitely no abrasives.

Always check your lid seals and ball lock fittings too — gunk loves to hide there.

Frequently Asked Questions

Can I use this without pressure?

Absolutely. Just attach a standard airlock or blow-off tube and it works like a traditional gravity fermenter.

Can I serve straight from it?

Yep. Cold crash it, carbonate inside the tank, and hook it up to a tap or picnic faucet. It’s perfect for serving small batches straight from the fermenter.

What’s the safe pressure limit?

It’s rated to 5 bar at the factory, but in day-to-day brewing, stick to 2.4 bar (35 psi) max for safe operation.