Leidingwerk omzetten van US (inch) naar metrisch (mm) stelsel.
| US | Metrisch Buitenmaat | Metrisch Binnenmaat |
|---|---|---|
| 3/8 “ | +- 15 mm | +- 9,5 mm |
| 1/2 ” (0,5 “) | +- 21 mm | +- 14 mm |
| 3/4 ” (0,75 “) | +- 27 mm | +- 19 mm |
| 1 “ | +- 34 mm | +- 25 mm |
| 1 1/2 ” (1,5 “) | +- 48 mm | +- 41 mm |
| 2 “ | +- 60 mm | +- 52 mm |
| 2 1/2″ (2,5 “) | +- 73 mm | +- 63,5 mm |