13 mm (about 1/2" nominal) vs 16 mm (0.63" OD): specs compared
Updated 05 September 2026.
6
specs differ
13 mm (about 1/2" nominal) and 16 mm (0.63" OD) differ on 6 specs: outer diameter, role, fitting type, common kit, inner diameter, barb fits id.
| Spec | 13 mm (about 1/2" nominal) | 16 mm (0.63" OD) |
|---|---|---|
| Outer diameter | about 13 mm (barb sized 13 mm / 0.51 inch) | 16 mm (0.63 inch) |
| Role | small supply / branch line off a 16 mm main | the main supply line in most garden drip kits |
| Fitting type | insert barb or compression collar | |
| Common kit | sold paired with 16 mm pipe in starter sets | |
| Inner diameter | about 13.6 mm | |
| Barb fits ID | 16 mm barb, 0.63 inch outer |
Questions and answers
How do 13 mm (about 1/2" nominal) and 16 mm (0.63" OD) compare?
13 mm (about 1/2" nominal) and 16 mm (0.63" OD) differ on 6 specs: outer diameter, role, fitting type, common kit, inner diameter, barb fits id.