Collection: Valves
Valves – Heating & Hot Water System Components
Valves play a critical role in the safe operation, control and maintenance of heating and hot water systems. From protecting systems against excessive pressure to regulating flow, temperature and circulation, selecting the correct valve type is essential for reliability, compliance and long-term performance.
At Heatraq, our valves range covers domestic, commercial and managed building applications. Each category is organised by function, making it easier to identify the correct component for installation, maintenance or replacement. All valves are sourced from trusted manufacturers and selected to meet UK safety and performance expectations.
Browse Valves by Function
Use the links below to quickly find the correct valve type for your system:
- Safety & Relief Valves – Protect systems from excessive pressure or temperature
- Water Control & Regulation Valves – Manage incoming pressure and inlet conditions
- Mixing & Temperature Control Valves – Deliver safe, controlled outlet temperatures
- Isolation & Service Valves – Allow safe maintenance, draining and refilling
- Motorised & Actuated Valves – Enable automated flow control
- System & Auxiliary Valves – Support circulation, balancing and water level control
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Heatrae Sadia 95970356 Hotflo U5 Expansion Vessel & Check Valve Kit
Regular price £178.58 GBPRegular priceSale price £178.58 GBP -
Heatrae Sadia 95605045 Temperature & Pressure Relief Valve
Regular price £103.25 GBPRegular priceSale price £103.25 GBP -
Heatrae Sadia 95605021 Megaflo HE Coldwater Control Valve
Regular price £175.57 GBPRegular priceSale price £175.57 GBP -
Heatrae Sadia 95605825 8-Bar Pressure Relief Valve Cartridge
Regular price £59.99 GBPRegular priceSale price £59.99 GBP -
Heatrae Sadia 95605828 8-Bar Expansion Relief Manifold Valve
Regular price £131.25 GBPRegular priceSale price £131.25 GBP -
Heatrae Sadia 95605833 Solenoid Valve Assembly
Regular price £34.06 GBPRegular priceSale price £34.06 GBP -
Heatrae Sadia 95605891 3 Bar Pressure Reducing Valve Cartridge
Regular price £58.40 GBPRegular priceSale price £58.40 GBP -
Heatrae Sadia 95970205 Bypass Valve Assembly
Regular price £635.82 GBPRegular priceSale price £635.82 GBP -
Heatrae Sadia 24500019 Frese Optima Compact DN15
Regular price £260.18 GBPRegular priceSale price £260.18 GBP -
Heatrae Sadia 7031691 Cold Water Inlet Control Kit system Fit
Regular price £932.55 GBPRegular priceSale price £932.55 GBP -
Heatrae Sadia 7031690 Cold Water Inlet Control Kit SystemReady
Regular price £325.42 GBPRegular priceSale price £325.42 GBP -
Heatrae Sadia 5122985 Thermostatic Blending Valve
Regular price £162.96 GBPRegular priceSale price £162.96 GBP -
Heatrae Sadia 5136203 M/M Blue Handle Isolation Valve 3/4 BSP
Regular price £28.79 GBPRegular priceSale price £28.79 GBP -
Heatrae Sadia 7031588 Motorised Actuator Valve
Regular price £379.17 GBPRegular priceSale price £379.17 GBP -
Heatrae Sadia 7031587 40mm 2-Port Motorised Valve Body
Regular price £372.79 GBPRegular priceSale price £372.79 GBP -
Heatrae Sadia 7031586 32mm 2-Port Motorised Valve Body
Regular price £304.78 GBPRegular priceSale price £304.78 GBP
Heating & Hot Water Systems Valves – FAQ
What types of valves are used in heating and hot water systems?
Common valves include pressure relief valves, isolation valves, mixing valves, and safety valves, all essential for system control and protection.
How do I know which valve I need to replace?
Identify the valve type, pressure rating, and connection size. Matching the original valve specification or part number is recommended.
Why are pressure relief valves important?
Pressure relief valves protect heating and hot water systems by releasing excess pressure, helping to prevent system damage or failure.
Do you supply valves for commercial systems?
Yes, we stock valves suitable for domestic and commercial heating and hot water systems, including high-pressure applications.
Can a faulty valve affect system performance?
Yes, a faulty or worn valve can cause pressure issues, leaks, or reduced system efficiency and should be replaced promptly.