GAS Checkvalve vs Jg12i: specs compared
Updated 05 September 2026.
6
specs differ
GAS Checkvalve and Jg12i differ on 6 specs: designation, size / thread, fitting form, seals on, rating / role, tube od.
| Spec | GAS Checkvalve | Jg12i |
|---|---|---|
| Designation | 1/4" FFL x 1/4" MFL | 1/2" (12.7 mm) OD |
| Size / thread | 1/4" FFL (7/16-20 UNF) inlet and 1/4" MFL (7/16-20 UNF) outlet, or barb ends | 1/2" (12.7 mm) OD tube |
| Fitting form | one-way flare check valve | push-fit collet, imperial |
| Seals on | flare faces at each flare end; barb under a clamp on barb versions | single O-ring plus a stainless collet grab-ring |
| Rating / role | passes CO2 toward the keg and blocks beer or foam from returning up the gas line | John Guest Speedfit imperial fittings for 1/2 inch OD tube |
| Tube OD | 12.7 mm |
Questions and answers
How do GAS Checkvalve and Jg12i compare?
GAS Checkvalve and Jg12i differ on 6 specs: designation, size / thread, fitting form, seals on, rating / role, tube od.