
| Nominal Pipe Size | Minimum Length, A | Round Head Plugs | |
|---|---|---|---|
| Nominal Head Diameter, E | Minimum Length, D | ||
| 1/8 | 10 | 10 | 35 |
| 1/4 | 11 | 14 | 41 |
| 3/8 | 13 | 18 | 41 |
| 1/2 | 14 | 21 | 44 |
| 3/4 | 16 | 27 | 44 |
| 1 | 19 | 33 | 51 |
| 1 1/4 | 21 | 43 | 51 |
| 1 1/2 | 21 | 48 | 51 |
| 2 | 22 | 60 | 64 |
| 2 1/2 | 27 | 73 | 70 |
| 3 | 28 | 89 | 70 |
| 4 | 32 | 114 | 76 |