PP Union Plain x BSP
Technical Specification
- Material: Polypropylene block copolymer (PP-B)
- Fitting type: Union plain x BSP
- Pressure rating: 6 bar
- Operating temperature range: -20°C to 110°C (continuous)
- Manufacturing standard: DIN 16962
- Thread type: BSP (male)
- Connection type: Plain socket fusion x BSP threaded union
- Colour: Beige grey (RAL 7032)
Description
The PP union plain x BSP fitting is designed to join metric polypropylene pipework to BSP threaded components while allowing the joint to be easily disconnected when required. Unlike fixed adaptors, the integrated union nut enables straightforward removal of valves, instruments or sections of pipework for maintenance or system modification.
Manufactured from polypropylene block copolymer (PP-B), this union offers excellent impact strength, chemical resistance and durability across a wide operating temperature range. The plain socket end is suitable for socket fusion welding onto PP pipe, while the BSP threaded end connects directly to standard BSP female fittings.
With a 6 bar pressure rating, this union adaptor is ideal for low-pressure industrial systems where flexibility, corrosion resistance and serviceability are important.
Key Features & Benefits
- Demountable connection: Union design allows easy disassembly and maintenance
- Metric to BSP transition: Connects PP pipe to BSP threaded equipment
- 6 bar pressure rating: Suitable for threaded polypropylene applications
- PP-B construction: Enhanced impact resistance, even at low temperatures
- Socket fusion end: Provides a strong, permanent welded joint to pipe
- Chemical resistant: Well suited to aggressive and corrosive media
- Wide temperature range: Continuous operation from -20°C to 110°C
- Industrial ready: Commonly used in chemical processing, water treatment, laboratories and process plant installations


| Product Code | d x d1 (mm x inch) | D (mm) | I1 (mm) | I2 (mm) | Z1 (mm) | Z2 (mm) | Pressure Rating (bar) |
| 355725 | 20 x ½ | 46 | 36 | 19 | 22 | 5 | 6 |
| 355726 | 25 x ¾ | 53 | 37 | 22 | 21 | 6 | 6 |
| 355727 | 32 x 1 | 62 | 38 | 24 | 20 | 6 | 6 |
| 355728 | 40 x 1 ¼ | 74 | 41 | 26 | 21 | 6 | 6 |
| 355729 | 50 x 1 ½ | 107 | 46 | 28 | 23 | 5 | 6 |
| 355730 | 63 x 2 | 106 | 51 | 32 | 24 | 5 | 6 |
