Reliance RWC TPR15 Pressure and Temperature Relief Valve PTEM550853 1/2″ MBSP x 15mm Compression 10 Bar 95°C WRAS Approved
Reliance TPR15 PTEM550853 Pressure & Temperature Relief Valve provides 10 Bar pressure relief, 90–95°C temperature discharge, and a 95mm probe, WRAS approved for unvented systems.
- All prices include VAT
- Estimated Delivery: For most items (over 99% of our products), orders placed before 3pm on working days will be dispatched the same day with our Fast DELIVERY 1st class service. For the rare items not immediately in stock, dispatch may take 1-3 working days after receiving your order. If your order cannot be dispatched the same day, we will notify you via email.
- For boilers: We aim to dispatch on the next working day. However, in some cases, it may take 2-3 working days to dispatch. Rest assured, we will always strive for the fastest possible turnaround.
The Reliance RWC TPR15 PTEM550853 Pressure & Temperature Relief Valve is a precision-engineered safety device built to protect unvented hot water cylinders from overheating and over-pressurisation. Featuring a 10 Bar pressure release setting and a temperature relief range of 90–95°C, it activates when needed to discharge excess water, preserving both system integrity and user safety.
Equipped with a 95mm thermal probe, the valve ensures accurate monitoring of temperature at the hottest point in the cylinder. Its brass body construction guarantees durability, while the 1/2″ MBSP inlet and 15mm compression outlet allow for universal compatibility with standard UK fittings.
Fully WRAS approved and compliant with BS EN 1490, this valve is the ideal safety component for new installations or system upgrades in residential, commercial, or light industrial environments.
Key Features
• Dual Safety Function – Opens at 10 Bar or 90–95°C to prevent over-pressurisation and overheating
• Precision Thermal Monitoring – 95mm probe ensures accurate response to rising temperatures
• Durable Brass Construction – Engineered for long-lasting performance in demanding environments
• Universal Connection – Fits 1/2″ MBSP inlets and 15mm compression outlets
• WRAS & BS EN 1490 Approved – Certified for potable water systems and regulatory compliance
Applications
• Unvented Hot Water Cylinders – Safeguards sealed systems from unsafe pressure or heat
• Residential and Commercial Plumbing – Compatible with a wide range of installation settings
• System Repairs or Upgrades – Ideal for replacements or safety component integration
Technical Specifications:
| Feature | Details |
|---|---|
| Brand | Reliance Water Controls (RWC) |
| Manufacturer Code | PTEM550853 |
| Pressure Relief Setting | 10 Bar |
| Temperature Relief Setting | 90–95°C |
| Probe Length | 95mm |
| Inlet Connection | 1/2″ MBSP Threaded |
| Outlet Connection | 15mm Compression |
| Material | Brass |
| Maximum Discharge Capacity | 10kW |
28mm Lever Ball Valve Blue LBV28B 
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