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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 D1717). 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 D1718). The slightly wider 5mm ID allows for better gas flow.

• The "Secret Weapon": Buy a 7-in-1 Tool (MoreBeer D1269). 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 if different carbonation levels are needed from keg to keg. 

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

• CO2 Tank: KOMOS 5 lb Aluminum Tank (MoreBeer D1056K).

• Primary Regulator:  KOMOS Dual Gauge Regulator (MoreBeer D1077).

• Included Adapter: Duotight FFL to 8mm (MoreBeer DUO106). This screws onto the regulator output.

• Tee Splitter: Duotight 8mm Equal Tee (MoreBeer DUO1090). Use one Tee for 2 kegs, two for 3 kegs.

• Gas Quick Disconnect: Ball Lock Quick Disconnect (Gas) with Duotight 6.35mm (MoreBeer FE133).

• Duotight Reducer: 6.35mm x 8mm Duotight Reducer (MoreBeer DUO100). Use to connect FE133 to 8mm OD EVABarrier tubing.

Option B: Multiple Secondary Regulators (Different pressures)

• Primary Dual Regulator: KOMOS Dual Body Regulator (MoreBeer D1083).

• Inline Regulators: Duotight Inline Regulator (MoreBeer D1047). You need one for each keg you want to control independently.

• Regulator Manifold Board: Duotight Inline 4 Way Board(MoreBeer D1130/D1131). Fully loaded with on/off valves, inline regulators, and one-way check valves. 

• G2 Duotight Manifolds:  Newly designed Fully Duotight Manifolds (MoreBeer DUO260A,DUO260B,DUO260C) Available with 2, 4, or 6 outlets as well as on/off and check valves. 

3. Cornelius Keg Compatibility

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

*See our guides on Ball Lock Quick Disconnects and Sanke Keg Connectors for more info.

• Liquid Side: Duotight 8mm OD Liquid-Out Ball Lock Quick Disconnect (MoreBeer DUO151). This allows you to push your 8mm x 4mm ID liquid line directly into the keg connector.

• Gas Side: Duotight 8mm OD Gas-In Ball Lock Quick Disconnect (MoreBeer DUO150).

• Alternative: If you already have threaded MFL disconnects, just buy the FFL to 8mm adapters (MoreBeer DUO106) to convert them.

4. Kegerator or Keezer?

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

*See our guide on Keezer Design Tips and Tricks for help with parts and plans.

Kegerator (The Pro Choice)

• Example: Komos Kegerator (MoreBeer KG401).

• 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 FE640) because freezers will freeze your beer without one.