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Reliance Thermoguard Underfloor Heating Mixing Valve

Was £179.36
From Was £179.36
Was £179.36
Now £160.99
From £160.99
Now £160.99
Save £18.37 Save £18.37
in stock, ready to be shipped
Reliance Thermoguard Underfloor Heating Mixing Valve
From Was £179.36
Was £179.36
From £160.99
Now £160.99
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Fast & Reliable Delivery

For delivery on Tuesday

When ordered before 4pm (On weekdays)

The Reliance Thermoguard Mixing Valve Unit is a high-quality and reliable solution for blending and controlling the temperature of underfloor heating systems. This valve unit, model HEAT970366, features female 3/4" flow and return connections, ensuring compatibility with various plumbing setups. It is designed to replace the discontinued Reliance Thermomix, providing an upgraded and improved solution for temperature regulation in UFH systems.

    Key Features

    • Excellent Temperature Stability: The Reliance Thermoguard Mixing Valve Unit offers exceptional temperature stability, especially when return temperatures and mixed water are close to equal. This ensures consistent and comfortable heating performance.
    • Flexible Installation: This unit is designed with flexibility in mind, allowing for both left and right setup onto the manifolds. This versatility enables convenient installation in various plumbing configurations.
    • Low Temperature Functionality: The mixing valve is capable of functioning down to 25°C, ensuring that initial warm-up and commissioning can be carried out effectively. This feature is crucial for proper system operation and maintenance.
    • Slim Profile: The side profile of the valve is reduced, enabling easy fitting of the unit inside a cabinet or cupboard. This space-saving design ensures a neat and tidy installation.
    • Wide Temperature Range: The Thermoguard Mixing Valve Unit offers a temperature range of 25°C up to 60°C, accommodating different floor constructions and heating requirements.
    • Hot temperature supply range: 60°C – 85°C
    • Adjustable temperature range: 25°C – 60°C
    • Maximum supply pressure: 6 bar
    • Factory set temperature range: 45°C ± 2°C
    • Temperature stability: ± 2°C
    • Connections: Mixing valve inlets 3/4" FBSP, Manifold connections 1" MBSP
    Our reviews speak for themselves!

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    Product Question? Need help placing an order?

    Our customer support is available Monday to Friday 7am-6pm.

    Call us on 01268 567 016

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    Free delivery on all orders

    At The Underfloor Heating Store, we strive to make every step of your order as easy and convenient as possible, from finding the right underfloor heating setup to best suit you to taking delivery of your system the very next day.

    We're proud to offer a range of delivery options to suit you, including free delivery on all of our orders or next working day delivery for a fixed price of £4.99

    • 2-3 working days delivery - FREE (Order before 4pm Monday - Friday)
    • Next working day - £4.99 (Order before 4pm Monday - Friday, applies to orders over £19.99)
    • Next working day before 10.30am - £14.99 (Order before 4pm Monday - Friday)
    • Saturday delivery - £29.99 (Order before 4pm Monday - Friday)
    • Free collection from our Basildon warehouse in Essex

    Explore our full delivery policy

    30 days returns policy

    At The Underfloor Heating Store, our customers have 30 days to upgrade, replace or refund their orders.


    At The Underfloor Heating Store, we want to ensure you are happy with every purchase you make. If you have any issues with your chosen product, whether damaged, faulty or simply an unwanted item, you can simply return what you bought for a refund. Learn more.


    We take great care in the delivery of all of our products, however, in the event of your delivery arriving damaged or if you notice a manufacturing fault of any kind within 48 hours of delivery, you're within your rights to a replacement. Learn more.


    Within 14 days of purchasing from us, you are eligible to upgrade if you deem you want something a little better. Simply send it back to us brand new and we'll happily assist you with an upgrade to your order. Learn more.

    Lifetime warranty

    At The Underfloor Heating Store, we are committed to providing our customers with high-quality products and outstanding customer service. That's why we offer a comprehensive warranty on all of our underfloor heating products, with a lifetime warranty for our ProWarm range of products.

    Our warranties are designed to give you peace of mind and ensure that your underfloor heating system operates reliably for years to come.

    Find out more

    We'll beat any price

    At The Underfloor Heating Store, our main priority is customer satisfaction. To cement our commitment to this, we are proud to offer our Underfloor Heating Price Match Promise. If you find a lower price on an identical product anywhere else, we will match it – guaranteed!

    Discover our promise

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