1/2" US (0.700" OD) vs 1/4" (0.170" ID x 0.250" OD): specs compared
Updated 05 September 2026.
5
specs differ
1/2" US (0.700" OD) and 1/4" (0.170" ID x 0.250" OD) differ on 5 specs: outer diameter, inner diameter, fitting type, trap, barb fits id range.
| Spec | 1/2" US (0.700" OD) | 1/4" (0.170" ID x 0.250" OD) |
|---|---|---|
| Outer diameter | 0.700 inch (varies 0.620 to 0.710 inch by brand) | 0.250 inch (about 6.4 mm) |
| Inner diameter | about 0.600 inch | 0.170 inch (about 4.3 mm) |
| Fitting type | .700 barb, compression or Perma-Loc | push-in barb held by the tube wall |
| Trap | labelled 1/2 inch but not 16 mm metric | |
| Barb fits ID range | 0.140 to 0.170 inch |
Questions and answers
How do 1/2" US (0.700" OD) and 1/4" (0.170" ID x 0.250" OD) compare?
1/2" US (0.700" OD) and 1/4" (0.170" ID x 0.250" OD) differ on 5 specs: outer diameter, inner diameter, fitting type, trap, barb fits id range.