CO2 88G vs Ball-lock quick disconnect (ball-lock QD: specs compared
Updated 05 September 2026.
5
specs differ
CO2 88G and Ball-lock quick disconnect (ball-lock QD differ on 5 specs: designation, size / thread, fitting form, seals on, rating / role.
| Spec | CO2 88G | Ball-lock quick disconnect (ball-lock QD |
|---|---|---|
| Designation | 3/8"-24 UNF (soda-maker 88g) | ball-lock QD, MFL or barb tail |
| Size / thread | 3/8"-24 UNF external thread, 88 gram cartridge | snaps over the corny post; tail is 1/4" MFL (7/16-20 UNF) or a 1/4"/5/16" barb |
| Fitting form | larger threaded disposable CO2 cylinder | snap-on quick disconnect |
| Seals on | a pierced or valved seat in the holder against the cartridge neck | O-ring seals over the post shoulder; the tail seals by flare or clamp |
| Rating / role | single-use 88 gram cartridge for soda makers and portable dispensers | the universal ball-lock keg connector; gas and liquid are keyed differently |
Questions and answers
How do CO2 88G and Ball-lock quick disconnect (ball-lock QD compare?
CO2 88G and Ball-lock quick disconnect (ball-lock QD differ on 5 specs: designation, size / thread, fitting form, seals on, rating / role.