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Replacing a CO2 bottle

When should you use this?

Written by Bram Sol

Use this article when the CO2 bottle is empty or needs to be replaced.
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Important

CO2 is odorless and operates under high pressure.
Always check for leaks after replacing the bottle.
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Steps: replacing the CO2 bottle

1. Close the bottle completely

Close the main valve by turning it clockwise.
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2. Release pressure from the system

  • Dispense beer

  • Or use the pressure relief valve

→ The pressure gauges should drop to 0
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3. Remove the pressure regulator

Loosen the coupling nut with a wrench.
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4. Check the sealing ring

  • Not cracked

  • Not flattened

→ Replace it if in doubt
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5. Place the new bottle

Place it upright and in a stable position.
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6. Mount the regulator

  • First tighten by hand

  • Then tighten firmly

  • Do not use Teflon tape

7. Open the bottle slowly

Expected pressure: ±50–60 bar
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8. Set the operating pressure

Beer guideline: 0.6 – 0.8 bar
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Leak check (mandatory)

  • Spray soapy water on the connection

  • Bubbles visible → leak

  • No bubbles → OK

Common mistakes

  • Opening the bottle too quickly

  • Not performing a leak check

  • Forgetting to check the sealing ring

Quick check

  • Pressure remains stable

  • No hissing sound

  • No bubbles at the coupling

→ The system is safe to use.

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