Open only with the special sampler cup (but a piece of wire will do in an emergency!).| Description | Part Number |
|---|---|
| 1/8” NPT | F391-18 |
| 1/4” NPT | F391-14 |
| 3/8” UNF | F391-32 |
| 7/16” UNF | F391-72 |
| Samper Cup | 05-17300 |
| Part Number | Description | Stock | Price | |
|---|---|---|---|---|
| F391-72 | FLUSH DRAIN VALVE F-391-72 | 0 | £16.72 | |
| F391-32 | FLUSH DRAIN VALVE F-391-32 | 5 | £15.12 | |
| F391-18 | FLUSH DRAIN VALVE F-391-18 | 3 | £15.89 | |
| F391-14 | FLUSH DRAIN VALVE F-391-14 | 2 | £17.09 | |
| 05-17300 | F-391 DRAIN VALVES SAMPLER CUP | 5 | £2.68 |