Radiator Valves

Manual vs Thermostatic Radiator Valves

The two main types are manual radiator valves and thermostatic radiator valves (TRVs).

Manual Radiator Valves

A manual radiator valve is adjusted by hand to increase or reduce the flow of hot water through the radiator. It is a straightforward option for simple, direct temperature control.

Thermostatic Radiator Valves (TRVs)

A thermostatic radiator valve automatically adjusts the flow of hot water according to the temperature around the radiator. This provides greater room-by-room temperature control.

TRVs can be useful when different rooms need different heating levels, such as keeping a living room warmer while using a lower setting in a spare bedroom.

Angled, Straight or Corner Radiator Valves?

The correct valve configuration depends mainly on your pipework and radiator connections. Choosing the wrong type can make installation difficult or prevent the valve from connecting correctly.

Angled Radiator Valves

Angled radiator valves are commonly used when pipework comes from the floor and connects to radiator connections positioned at the side. The valve changes direction between the pipe and radiator.

Straight Radiator Valves

Straight radiator valves are suitable where the pipe and radiator connections are positioned in a relatively straight line. They are often used where connections and pipework are aligned.

Corner Radiator Valves

Corner radiator valves provide a compact 90-degree connection and can be useful where pipework comes from the wall or where you want the valve to sit neatly alongside the radiator.

Always check the radiator manufacturer's connection specifications before choosing a configuration.

How Do I Know Which Radiator Valve I Need?

Check your radiator connections and pipework layout before ordering. You should confirm:

• Connection size and position
• Pipe centres
• Pipework diameter
• Angled, straight or corner configuration
• Manual or thermostatic control

Many UK radiators use 15mm connections, but this can vary. Designer, column and specialist radiators may have different requirements, so always check the product specification before purchasing.

Do Radiator Valves Come as a Pair?

Many radiator valve sets are supplied as a pair, with one control valve and one lockshield valve. However, this can vary between products, so check the individual product listing to confirm exactly what is included.

What Is a Lockshield Valve?

A lockshield valve regulates water flow through the radiator and helps balance your central heating system. It is normally fitted opposite the TRV or manual control valve.

Choosing the Right Radiator Valve Finish

Radiator valves are visible once installed, so the finish can make a noticeable difference to the overall appearance.

Popular options include:

• Chrome - versatile for modern and traditional radiators
• Black - ideal for contemporary designs
• Anthracite - suits darker and neutral interiors
• Brass/Brushed Brass - adds a warmer decorative finish

Choose a matching finish for a coordinated appearance or a contrasting finish to create more visual interest.

Radiator Valves for New and Replacement Radiators

When buying a new radiator, check its connection specifications before choosing valves. This is particularly important when purchasing valves for designer radiators, column radiators or vertical designer radiators, as connection positions can vary between models.

If you're replacing old valves, check for leaks, damage, difficulty operating the valve, or compatibility issues with your new radiator.

Changing radiator valves may require part of the central heating system to be drained and refilled. If you're unsure about compatibility or installation, consult a qualified heating professional.

For exposed pipework, radiator pipe sleeves can provide a cleaner finish where pipes enter the wall or floor. You can also explore radiator feet where additional support is required.

Frequently Asked Questions

What radiator valves do I need?

The correct valve depends on your radiator connections and pipework layout. Check whether you need angled, straight or corner valves, then confirm the connection size and whether manual or thermostatic control is suitable.

What is the difference between a TRV and a manual radiator valve?

A manual valve is adjusted by hand, while a TRV automatically regulates water flow according to the temperature around the radiator, providing greater room-by-room control.

Do I need two valves for one radiator?

A standard radiator normally uses a valve at each end, typically one control valve and one lockshield valve. Check the product description to confirm what is included.

Will 15mm radiator valves fit my radiator?

Many UK radiators use 15mm connections, but this is not universal. Always check the radiator and valve specifications before ordering.

Are angled or straight radiator valves better?

Neither is automatically better. The correct type depends on how your pipework meets the radiator and where the radiator connections are positioned.

Can radiator valves match my radiator?

Yes. Matching finishes such as black, anthracite or chrome can create a coordinated installation, while contrasting finishes can provide a different design effect.

Should I choose TRVs for every radiator?

TRVs can provide useful room-by-room temperature control, but the ideal setup depends on your heating system. If you're unsure, consult a qualified heating professional.

Find the Right Radiator Valves

Choosing the right radiator valves comes down to three key factors: connection type, pipework layout and preferred control. Once these are confirmed, you can choose the finish and style that suits your radiator.

Browse our range of radiator valves to compare manual and thermostatic options in angled, straight and corner configurations. Choose the correct connection type and finish for your radiator, and check the product specifications before ordering.

If you're buying a new radiator, use our BTU Calculator to estimate the required heat output, then check the radiator's connection specifications before selecting your valves.