Venting valves in plastic ABS.
It lets air in, avoiding “the gurgling sound” caused by suction.
Prevents the emission of bad odours.
| Ø | ART. | Description |
| 32 | 9.3983.01 | Durgo 32 |
| 40 | 9.3983.02 | Durgo 40 |
| *50 | 9.3983.09 | Durgo 50/40 |
| 50 | 9.3983.03 | Durgo 50 |
| 75 | 9.3983.04 | Durgo 75 |
| 90 | 9.3983.05 | Durgo 90 |
| 100 | 9.3983.08 | Durgo 100 |
| 110 | 9.3983.06 | Durgo 110 |
| 140 | 9.3983.07 | Durgo 140 |
