Tube Size
Since there are various terminologies in common uses to determine tube size, the following table is given to compare and relate them to the fitting size reference.
| TUBE INCHES DIAMETER | NOMINAL BORE mm | EXTERNAL DIAMETER mm |
|---|---|---|
| 1/2" | 15 | 19.5 |
| 1" | 25 | 32.5 |
| 1 1/4" | 30 | 41.5 |
| 1 1/2" | 40 | 48.3 |
| 2" | 50 | 60.3 |