GAS Shutoff vs JG8: specs compared
Updated 05 September 2026.
6
specs differ
GAS Shutoff and JG8 differ on 6 specs: designation, size / thread, fitting form, seals on, rating / role, tube od.
| Spec | GAS Shutoff | JG8 |
|---|---|---|
| Designation | 1/4" MPT x 1/4" MFL | 5/16" (8 mm) OD |
| Size / thread | 1/4" MPT (1/4-18 NPT) one end, 1/4" MFL (7/16-20 UNF) the other, often with a check valve | 5/16" (about 7.94 mm) |
| Fitting form | quarter-turn ball shutoff | push-fit collet, imperial |
| Seals on | NPT end taped on the thread; MFL end on the flare face | single O-ring plus stainless collet grab-ring |
| Rating / role | shuts a single gas line without touching the regulator; some carry a check valve too | John Guest Speedfit rated 16 bar at 1 C, 10 bar at 20 C |
| Tube OD | 7.94 mm |
Questions and answers
How do GAS Shutoff and JG8 compare?
GAS Shutoff and JG8 differ on 6 specs: designation, size / thread, fitting form, seals on, rating / role, tube od.