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1. The Core: Tubing & Connectors

For a home setup, the 8mm (5/16") OD standard is the way to go. It is the most common size for duotight fittings.

• Liquid Line: EVABarrier 4mm ID x 8mm OD (MoreBeer D1204). The 4mm ID provides the flow resistance needed so your beer doesn't come out as a glass of foam. You typically want 6–7 feet per tap.

• Gas Line: EVABarrier 5mm ID x 8mm OD (MoreBeer D1205). The slightly wider 5mm ID allows for better gas flow.

• The "Secret Weapon": Buy a 7-in-1 Tool (MoreBeer D1291). It acts as a specialized wrench for the fittings and a tube cutter to ensure your cuts are perfectly square for a leak-free seal.

2. CO2 Setup: Parts List

You can either use a simple manifold (Tee) or individual regulators.

Option A: The "Tee" Splitter (Same pressure for all kegs)

• CO2 Tank: 5 lb Aluminum Tank (MoreBeer D1012).

• Primary Regulator: MK4 Dual Gauge Regulator (MoreBeer D1061).

• Regulator Adapter: duotight FFL to 8mm (MoreBeer D1206). This screws onto the regulator output.

• The Splitter: duotight 8mm Equal Tee (MoreBeer D1201). Use one Tee for 2 kegs, two for 3 kegs.

• Gas Disconnects: Ball Lock Quick Disconnect (Gas) with duotight 8mm (MoreBeer D1231).

Option B: Multiple Secondary Regulators (Different pressures)

• Primary Regulator: MK4 Dual Gauge (MoreBeer D1061).

• Inline Regulators: duotight Inline Regulator (MoreBeer D1200). You need one for each keg you want to control independently.

• Gauges: Mini Pressure Gauge 0-60 PSI (MoreBeer D1211). These plug directly into the inline regulators.

• Tee Splitters: Use the 8mm Equal Tee (MoreBeer D1201) to branch the high-pressure gas from the main tank to each inline regulator.

3. Cornelius Keg Compatibility

To connect your lines to your Ball Lock Cornelius Kegs, you need specific disconnects that play nice with duotight.

• Liquid Side: Ball Lock Quick Disconnect (Liquid) with duotight 8mm (MoreBeer D1230). This allows you to push your 4mm ID liquid line directly into the keg connector.

• Gas Side: Ball Lock Quick Disconnect (Gas) with duotight 8mm (MoreBeer D1231).

• Alternative: If you already have threaded MFL disconnects, just buy the FFL to 8mm adapters (MoreBeer D1206) to convert them.

4. Kegerator or Keezer?

Choosing your housing depends on your space and how many beers you want on tap.

Kegerator (The Pro Choice)

• Example: Komos Kegerator (MoreBeer D1320).

• Pros: It’s a dedicated fridge designed for beer. It has a tower on top, an internal fan to keep lines cold, and a stainless steel floor to handle heavy kegs.

• Cons: Limited space. You can usually fit 3–4 kegs maximum.

Keezer (The DIY Choice)

• The Build: You buy a chest freezer and build a wooden "collar" between the freezer body and the lid to mount your taps.

• Pros: Massive capacity. A medium chest freezer can hold 6+ kegs and a CO2 tank easily. It's often cheaper if you find a used freezer.

• Cons: You have to lift heavy kegs over the edge. You also need a temperature controller like the Inkbird (MoreBeer FE610) because freezers will freeze your beer without one.