Durapipe HTA Reducing Bush Short Pattern
Technical Specification
- Manufacturer: Durapipe
- Material: Chlorinated polyvinyl chloride (CPVC)
- Application: Hot and cold water distribution
- Fitting type: Short pattern reducing bush
- Connection method: Solvent weld socket x socket
- Operating temperature range: 5°C to 90°C
- Maximum working pressure: Up to 25 bar
- Pressure rating at 70°C: 10 bar
- Suitability: Potable (drinking) water
- Fire classification: Euroclass B-s1,d0
- Approvals: WRAS approved
- System compatibility: HTA matched pipe, fittings and valves
Description
HTA short pattern reducing bushes are designed to provide a compact and efficient reduction between different pipe diameters within HTA hot and cold water systems. Their shorter overall length makes them particularly suitable for installations where space is limited or where a minimal change in pipeline geometry is required.
Manufactured from high-performance CPVC, these reducing bushes offer excellent resistance to corrosion, scaling and chemical attack, ensuring long service life even in demanding operating conditions. The smooth internal bore helps maintain consistent flow characteristics while reducing frictional losses and the potential for biofilm development.
Produced as part of the HTA system by Aliaxis, short pattern reducing bushes integrate seamlessly with compatible HTA pipes and fittings. Solvent weld installation allows for fast, clean assembly without the need for hot works, making them a reliable and cost-effective alternative to metallic reducers.
Key Features & Benefits
- Compact short pattern design: Ideal for installations with limited space
- High pressure rated: Suitable for systems operating up to 25 bar
- WRAS approved: Certified for potable water applications
- Corrosion-free CPVC: Will not rust, scale or degrade over time
- Smooth bore construction: Supports efficient flow and reduced pressure loss
- Wide temperature capability: Designed for continuous use up to 90°C
- Fire performance: Euroclass B-s1,d0 classification
- HTA system matched: Engineered specifically for use with HTA pipe networks

| Product Code | D-d (mm) | Z (mm) | E (mm) | L (mm) |
| 354418 | 25-20 | 3 | 17 | 20 |
| 354419 | 32-25 | 4.5 | 19 | 23.5 |
| 354420 | 40-32 | 5.5 | 23 | 28.5 |
| 354421 | 50-40 | 6.5 | 26 | 32.5 |
| 354422 | 63-50 | 8 | 31 | 39 |
| 354423 | 75-63 | 7 | 37.5 | 44.5 |
| 354424 | 90-75 | 7.5 | 44 | 51.5 |
| 354415 | 110-90 | 10 | 52 | 62 |
| 354416 | 125-110 | 8 | 63 | 71 |
Working Pressures & Temperatures
| Temperature °C | (PN25) 70°C / 10 bar 60°C / 6 bar | (PN16) 70°C / 6 bar 60°C / 4 bar |
| Pressure (bar) | Pressure (bar) | |
| 5 | 25 | 16 |
| 20 | 25 | 16 |
| 40 | 20 | 12 |
| 60 | 13 | 8 |
| 70 | 10 | 6 |
| 80 | 6 | 4 |
| 90 | 4 | 2 |
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