Non-return
Valve
Non-return
valve manufactured from brass. BSP thread on all screw threads.
Made in Italy
1/2 inch Male & 1/2 inch Male BSP thread
The British Standard Pipe (BSP) is a family of standard screw thread types that has been adopted internationally for interconnecting and sealing pipe ends by mating an external (male) with an internal (female) thread and has been adopted as a standard scale used in plumbing fittings.
BSP = British Standard Pipe measured in inches
| Nom size |
Dash size |
TPI Threads Per Inch |
Thread pitch |
Major diameter |
Minor diameter |
Gauge length |
|||
| (in) | (in) | (in−1) | (mm) | (in) | (mm) | (in) | (mm) | (in) | (mm) |
| 1⁄8 | −2 | 28 | 0.907 | 0.0357 | 9.728 | 0.383 | 8.565 | 0.3372 | 4±0.9 |
| 1⁄4 | −4 | 19 | 1.337 | 0.0526 | 13.157 | 0.518 | 11.445 | 0.4506 | 6±1.3 |
| 3⁄8 | −6 | 19 | 1.337 | 0.0526 | 16.662 | 0.656 | 14.950 | 0.5886 | 6.4±1.3 |
| 1⁄2 | −8 | 14 | 1.814 | 0.0714 | 20.955 | 0.825 | 18.633 | 0.7336 | 8.2±1.8 |
| 3⁄4 | −12 | 14 | 1.814 | 0.0714 | 26.441 | 1.041 | 24.120 | 0.9496 | 9.5±1.8 |
| 1 | −16 | 11 | 2.309 | 0.0909 | 33.249 | 1.309 | 30.292 | 1.1926 | 10.4±2.3 |
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