Not compatible. 88g threaded CO2 cartridge and CGA-320 CO2 cylinder valve do not share a mating thread, so there is no adapter between them; fit the part that matches your hardware. Sealing method, the real-world trap, and the exact part to buy.
Updated 05 September 2026.
Connect 88g threaded CO2 cartridge to CGA-320 CO2 cylinder valve
How to join 3/8"-24 UNF (soda-maker 88g) and 0.825"-14 NGO RH, and what stops it leaking.
Not compatible. 88g threaded CO2 cartridge and CGA-320 CO2 cylinder valve do not share a mating thread, so there is no adapter between them; fit the part that matches your hardware.
The two ends
- End A
- 88g threaded CO2 cartridge (3/8"-24 UNF (soda-maker 88g))
- End B
- CGA-320 CO2 cylinder valve (0.825"-14 NGO RH)
- A seals on
- a pierced or valved seat in the holder against the cartridge neck
- B seals on
- nylon or fibre washer inside the nut against the valve outlet
- Part needed
- matched replacement, no adapter exists
The part to buy
An 88 gram cartridge does not thread onto a CGA-320 regulator; it needs a cartridge holder that pierces or seats the cartridge and presents a normal connection. A bench regulator expects a refillable CGA-320 cylinder, not a disposable cartridge.
Disposables are for portable chargers, not bench regulators. For a regulator on gas use a refillable CGA-320 cylinder; for a cartridge, buy the matching 88g holder rather than trying to mate a cartridge to a regulator.
Related connections
Questions and answers
Connect 88g threaded CO2 cartridge to CGA-320 CO2 cylinder valve?
Not compatible. 88g threaded CO2 cartridge and CGA-320 CO2 cylinder valve do not share a mating thread, so there is no adapter between them; fit the part that matches your hardware.