PP Reducing Bush
Technical Specification
- Material: Polypropylene block copolymer (PP-B)
- Fitting type: Plain reducing bush
- Pressure rating: 10 bar
- Operating temperature range: -20°C to 120°C
- Colour: Beige grey (RAL 7032)
- Standards: DIN 16962 Parts 5/6/7/8/9/12, ISO 7279:1984, ISO 15494:2003 Type B
- Jointing method: Socket fusion welding
- Internal profile: Smooth bore
Description
This polypropylene reducing bush is used to transition between different pipe diameters within metric PP pressure systems. Manufactured from high heat stabilised PP-B material, it provides a compact and reliable solution for reducing line size without introducing unnecessary complexity into the pipework layout.
The bush can be installed within compatible PP fittings or used to connect pipes of differing diameters, allowing system designers to adapt flow capacity while maintaining pressure integrity. When fusion welded, it forms a continuous, homogenous joint that delivers long-term mechanical strength and excellent resistance to aggressive chemicals.
Polypropylene’s corrosion resistance and dimensional stability make this fitting well suited to demanding industrial environments where metallic reducers may suffer from chemical attack or scaling. Its ductile properties also help accommodate thermal expansion and system movement, supporting reliable performance over the life of the installation.
Key Features & Benefits
- 10 bar pressure rating: Suitable for pressure-rated polypropylene pipe systems
- Diameter reduction: Allows smooth transition between different pipe sizes
- PP-B construction: Block copolymer material provides enhanced impact resistance, including at lower temperatures
- Wide operating temperature range: Performs reliably from -20°C up to 120°C in continuous service
- Fusion welded joint: Creates a strong, permanent connection with excellent chemical resistance
- Smooth bore design: Helps maintain efficient flow through the transition
- Corrosion resistant: Will not rust, scale or degrade in aggressive environments
- Compact fitting: Ideal where space is limited within pipework assemblies
- Industrial suitability: Commonly used in chemical processing, laboratories, water treatment, food production and manufacturing systems
| Product Code | d x d1 (mm x inch) | I (mm) | Z (mm) | Pressure Rating (bar) |
| 355886 | 25 x 20 | 37 | 23 | 10 |
| 355887 | 32 x 20 | 42 | 26 | 10 |
| 355888 | 32 x 25 | 48 | 32 | 10 |
| 355889 | 40 x 25 | 48 | 32 | 10 |
| 355890 | 40 x 32 | 46 | 28 | 10 |
| 355891 | 50 x 32 | 56 | 32 | 10 |
| 355892 | 50 x 40 | 50 | 30 | 10 |
| 355893 | 63 x 32 | 63 | 45 | 10 |
| 355894 | 63 x 50 | 56 | 33 | 10 |
| 355895 | 75 x 63 | 61 | 33 | 10 |
| 355896 | 90 x 63 | 80 | 53 | 10 |
| 355897 | 90 x 75 | 70 | 36 | 10 |
| 355899 | 110 x 63 | 79 | 50 | 10 |
| 355898 | 110 x 90 | 83 | 48 | 10 |
| 355900 | 160 x 90 | 138 | 104 | 10 |
| 355901 | 160 x 110 | 125 | 84 | 10 |
If you require any further information, our excellent customer service team is here to help so please call us on 01794 835835.
