JG4 vs Mini CO2 regulator (cartridge) (5/8-18 inlet: specs compared
Updated 05 September 2026.
6
specs differ
JG4 and Mini CO2 regulator (cartridge) (5/8-18 inlet differ on 6 specs: designation, size / thread, fitting form, seals on, rating / role, tube od.
| Spec | JG4 | Mini CO2 regulator (cartridge) (5/8-18 inlet |
|---|---|---|
| Designation | 4 mm OD | 5/8-18 inlet, 1/4" MFL out |
| Size / thread | 4 mm OD tube | 5/8-18 UNF inlet for a 74g threaded cartridge; 1/4" MFL (7/16-20 UNF) or 1/4" FFL outlet |
| Fitting form | push-fit collet, metric | compact cartridge-fed CO2 regulator |
| Seals on | single O-ring plus a stainless collet grab-ring | cartridge seat at the inlet; flare face at the outlet |
| Rating / role | John Guest Speedfit metric fittings for 4mm OD tube; tube OD must be within 0.1mm of nominal | a small regulator that runs off a 74g threaded CO2 cartridge instead of a full tank |
| Tube OD | 4 mm |
Questions and answers
How do JG4 and Mini CO2 regulator (cartridge) (5/8-18 inlet compare?
JG4 and Mini CO2 regulator (cartridge) (5/8-18 inlet differ on 6 specs: designation, size / thread, fitting form, seals on, rating / role, tube od.