Corner, straight, or angled radiator valves – which one should I choose?

Following on from our guide to the types of radiator valves that covers the differences between, thermostatic, manual, and smart valves, we now take a look at the different valve fittings available – straight, angled, and corner.

As we know, a radiator valve is a crucial component in a heating system, particularly in hydronic or central heating systems. Its primary function is to control the flow of hot water into the radiator, thereby regulating the amount of heat emitted into a room. Radiator valves are essential for maintaining a comfortable and energy-efficient indoor temperature as they allow for zone heating, enabling you to heat different areas or rooms of a building independently. This helps save energy by only heating occupied spaces.

Radiator valves can be fitted using several valve fittings. Which type of fitting you choose will be dependent on the configuration of your radiator and the location of the pipes. Your choice will be between straight, angled, or corner valves to ensure a proper fit. Here is a breakdown of the different types of valve fittings, along with examples of where and why you would need them:

Straight radiator valve

These valves have a straight vertical design and are typically used for radiators that are mounted flat against the wall.

Suitable for:
Straight radiator valves are suitable when the pipes come directly from the floor or wall, and the radiator is positioned close to the wall with no obstructions.

In a bedroom where the radiator is flush against the wall and the water pipes enter from below.

Angled radiator valve

Angled valves have a 90-degree bend in their design, allowing the pipe to run at an angle from the wall or floor to the radiator.

Suitable for:
These valves are ideal when there is limited space between the radiator and the wall, and the pipes need to change direction to connect to the radiator.

In a bathroom with limited wall space, where the radiator needs to be positioned closer to the wall and the pipes are coming from the side.

Corner radiator valve

Corner valves are designed to fit in the corner of a room. They have a 90-degree bend like angled valves but are specifically made for corner-mounted radiators.

Suitable for:
Corner valves are used when radiators are placed in room corners, allowing for efficient pipe routing without obstructing the room’s layout.

In a living room where a radiator is positioned in the corner to maximise space utilisation.

While corner valves are less commonplace than angled valves, they are worth considering if you are looking for a streamlined look or a specific vision for your room. Corner valves are suited for the same pipework as angled valves except they cannot be used for floor pipework. Instead, angled valves are consigned to wall-based connections only – these are often preferred in modern homes anyway.

Other considerations when choosing radiator valves

Aside from the appropriate fitting, other things you will need to consider when choosing a radiator valve for your heating system to ensure it functions properly and meets your specific needs include:

Valve size

Valves come in various sizes, typically specified in millimetres (e.g. 10mm, 15mm, 22mm). The size of the valve should match the size of the pipes in your heating system. Mismatched sizes can lead to leaks and reduced efficiency.


Valves are available in different materials, with brass and chrome being common options. Brass valves are durable and resistant to corrosion, making them suitable for long-term use. Chrome valves have an aesthetic advantage and are easy to clean but may be less durable.

Valve function

Consider whether you want a basic manual valve or a thermostatic radiator valve (TRV) with a built-in thermostat for temperature control. TRVs can help you achieve better energy efficiency by automatically adjusting the heat output based on the desired room temperature.

Pipe connection

Ensure that the valve fitting matches the type of pipe connection in your heating system. Valves typically have either compression fittings or threaded fittings. Make sure they are compatible with your existing pipework.


Set a budget for your valve fitting. While it’s important to invest in quality valves to prevent leaks and ensure long-term reliability, there are various price points and brands available, so consider your budget constraints.


If aesthetics are important to you, consider the design and finish of the valve. Chrome or decorative finishes may be preferred for visible installations in living spaces.

Ease of maintenance

Some valves are designed for easy maintenance and servicing, which can be important for long-term functionality. Check if the valve allows for straightforward disassembly and cleaning.

Local regulations and codes

Ensure that the valve you choose complies with local building codes and regulations related to heating systems and plumbing. Local requirements may dictate specific valve types or materials.

Manufacturer and warranty

Choose valves from reputable manufacturers with a history of quality products. Check for warranties, as they can provide peace of mind regarding the durability and reliability of the valve.

Compatibility with radiator

Ensure that the chosen valve is compatible with your specific radiator model. Some radiators may have unique requirements for valve fittings, so consult the radiator manufacturer’s recommendations if needed.


Consider whether you’ll be installing the valves yourself or hiring a professional. If you’re not experienced with plumbing, it’s best to seek expert installation to avoid potential issues.


In summary, radiator valves play a vital role in controlling the heat output of radiators in a heating system. The choice between straight, angled, or corner valves depends on the specific installation requirements, space constraints, and the positioning of the radiator in relation to the pipes and room layout.

Happy Dog Plumbing specialise in domestic plumbing diagnostics and repairs. So, whether you are a private homeowner, tenant, landlord or property management company, you can trust a Happy Dog engineer to provide the service you need.  Give us a call today and we will chat through your requirements. 020 88797372.