Durapipe HTA Threaded Reduced Tees
Technical Specification
- Manufacturer: Durapipe
- Material: Chlorinated polyvinyl chloride (CPVC) x brass
- Application: Hot and cold water distribution
- Connection type: Solvent weld sockets x brass threaded branch outlet
- Thread type: Female BSPP (parallel)
- 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 threaded reduced tees are designed to introduce a reduced, threaded branch connection from an HTA CPVC pipeline within pressurised hot and cold water systems. They are particularly well suited to applications where valves, taps, instruments or ancillary equipment need to be connected via a smaller, demountable threaded outlet.
The CPVC body provides excellent resistance to corrosion, scale and chemical attack, ensuring long-term durability and protection of water quality. The integrated brass female thread offers mechanical strength and secure engagement with threaded components, while the smooth internal bore helps maintain efficient flow and reduce pressure losses through the fitting.
Manufactured as part of the HTA system by Aliaxis, these threaded reduced tees integrate seamlessly with compatible HTA pipes and fittings. Solvent weld installation is quick and clean, avoiding hot works and making them a reliable, cost-effective alternative to traditional metal reducing tees.
Key Features & Benefits
- High pressure rated: Suitable for systems operating up to 25 bar
- Reduced threaded branch: Ideal for connecting smaller threaded outlets or equipment
- WRAS approved: Certified for potable water applications
- CPVC to brass construction: Combines corrosion resistance with mechanical strength
- Smooth bore design: Helps minimise friction, scale formation and biofilm risk
- Wide temperature capability: Designed for operation from 5°C to 90°C
- Fire performance: Achieves Euroclass B-s1,d0 classification
- HTA system matched: Engineered specifically for use with HTA pipes and fittings

| Product Code | D (mm) | G (Inch) | Z (mm) | E (mm) | A (mm) | A1 (mm) | L (mm) | Z1 (mm) | L1 (mm) |
| 354436 | 32 | 3/4" | 17 | 23 | 43 | 46 | 80 | 28 | 47 |
| 354437 | 40 | 3/4" | 21.5 | 26.5 | 54 | 47 | 96.5 | 28 | 47 |
| 354438 | 50 | 3/4" | 26 | 33 | 65 | 47 | 118.5 | 28.5 | 47 |
| 354439 | 63 | 3/4" | 33 | 38.5 | 79.5 | 47 | 142.5 | 35 | 53.5 |
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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