Gas Line Tubing and Connector Info

• gas
• connections
• spunding
• fermentation
• keg

• R

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  Ideas! Lots of them!

  Ryan

  2/24/25, 4:08 AM

  Hello @April Hsiung @Admin @Admin or whoever else may be able to help,

  I was hoping someone would be able to tell me what the size is for the gas line tubing, and what type of connector the pressurized gas connector is / what type is the keg pressurized gas inlet?

  My goal is to attach a spunding valve to the gas inlet connection on the keg, so that I can control the keg pressure to a specific value during fermentation and keg transfers.

  I was thinking something like this, but need to figure out how to connect it to the keg.

  Duotight BlowTie 2 | Diaphragm Spunding Valve | Built-In Pressure Gauge | 0-15 PSI | 8 mm Duotight | MoreBeer

  Do you also sell or would be able to send additonal pressurized gas connectors?

  Thank you!

  Ryan

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• F

  Freddie

  2/26/25, 8:25 PM

  Hi Ryan,

  1. The gas quick connector on the iGulu keg lid is custom-made and cannot be purchased on the market. The gas tubing specifications are ID 4mm × OD 6mm.
  2. The F1 machine currently supports counter-pressure transfer without requiring additional accessories.
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  Freddie

  2/26/25, 8:29 PM

  Step-by-Step Instructions for Counter-Pressure Transfer:

  • Prepare the New Keg: Clean and sanitize the new keg thoroughly.
  • Assemble the Transfer Line: Connect one end of the transfer line to the machine’s gas quick connector. Connect the other end to the beer quick connector of the new keg. （CO2 will enter through the beer tube to the bottom of the keg. Manually lift the PRV (Pressure Relief Valve) to displace the air from bottom to top, ensuring a perfect gas exchange.）
  • Replacing the air in the new keg with CO2：On the machine screen, enter Master Mode → Craft → Pressuring → CO2. Manually fill the new keg with CO2 (10-15 psi).
  • If you prefer not to set the pressure manually, you can switch to either, the program will automatically replenish CO2 accordingly
  • Cooling CO2 Mode (maintains a stable 6 psi).
  • Sparkling Water Mode (maintains a stable 15 psi).
  • After the air replacement is complete, the new keg should be pre-pressurized to 10-15 psi, and all white clamp valves should be closed.
  • Disconnect one end of the transfer line from the machine’s **gas quick connector** and reconnect it to the **beer quick connector** of the old keg. Then, restore the **gas supply line** to the old keg.  
  • Pressurize the old keg** by adding CO2 to your desired pressure, typically 15-20 psi.  
  • Finally, **release the white clamp valve**, and the beer will automatically transfer from the old keg to the new keg under **oxygen-free counter-pressure filling**.

  Important Notes:

  • If you plan to dry hop or add other flavors, do so before the "CO2 →Air  replacement" step. It is recommended to use a tea strainer or tea infuser to prevent clogging the beer lines.
  • During the beer transfer, continuously add CO2 to the old keg while gently lifting the PRV on the new keg to release slight pressure (do not fully depressurize it).
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