Radiator Valves Explained: Types, Uses & How to Choose the Right One

Key Findings

Manual radiator valves are budget-friendly and easy to use. These are ideal for basic heat control in rooms where maintaining a consistent temperature isn't a priority.
Thermostatic radiator valves (TRVs) help save energy. They sense room temperature and automatically adjust heat flow to maintain comfort without wasting heat.
Lockshield valves balance heating systems. By regulating return water flow, they help radiators heat evenly — especially important in larger homes.
Orientation affects installation. Choose straight, angled, or corner valves based on your pipework setup to ensure a proper fit and clean look.
Valve design impacts your room's style. Finishes like chrome, brass, black, and nickel can be matched to your décor for a polished appearance.
Check compatibility with your heating system. Most homes use 15 mm valves, but be sure to match the size and type to your setup, especially if using dual-fuel or smart systems.

Radiator valves may seem like a minor detail in your home, but they play an essential role in how your heating system performs. They give you control over turning a radiator off completely or adjusting the temperature room by room. That flexibility makes your home more comfortable and your heating more efficient.

There are many different types of radiator valves to choose from, including manual, thermostatic (TRV), lockshield, and dual-fuel options. Whether you're fitting a new radiator, looking into a designer radiator, or upgrading existing valves, this guide will help you make a confident, smart heating choice.

What Are Radiator Valves?

Radiator valves are the fittings that connect your radiator to your heating system. They control the flow of hot water in and out, which determines how much heat the radiator gives off. You can shut off one or more radiators completely if needed — helpful for summer, when you don't need the whole system running. Valves also make maintenance easier by preventing water from spilling from open pipework.

Types of Valves

There are several types of radiator valves, each serving a specific purpose depending on your heating setup and the level of control you want.

Manual Valves

These valves work like taps — twist them to let more or less hot water into the radiator. They've been around for decades and still do the job well. With full manual control, you can tweak the heat level in each room to your liking. Simple, affordable, and reliable.

Thermostatic Radiator Valves (TRVs)

TRVs automatically respond to the room temperature. They include a sensor in the valve head that opens or closes the valve based on temperature. That means no constant fiddling, and you can avoid overheating rooms. They cost more than manual valves, but they improve energy efficiency and save you money in the long run.

Lockshield Valves

Lockshield radiator valves are usually installed on the radiator's return side. Once set, they're rarely adjusted. Lockshield valves help control how much hot water returns to the system, making sure each radiator heats up evenly. That balance is essential in larger systems with multiple radiators.

Dual-Fuel Valves

These are for dual-fuel radiators, such as heated towel rails with heating controls, that can run independently of your central heating. Inside is an electric heating element that works even when the boiler is off. That's ideal for bathrooms or warm-weather use — and they don't need extra pipework.

Straight, Angled, and Corner Radiator Valves

How the valve connects to your radiator matters. Here's how each one works:

Straight radiator valves. Connect vertically from pipes that rise directly from the floor into the radiator. Common in traditional setups.
Angled radiator valves. Make a 90-degree connection from either the floor or wall to the radiator. These are the most widely used types.
Corner radiator valves. Connect the wall-mounted pipework horizontally to the side of the radiator. They offer a tidy, discreet finish.

Comparing Traditional & Modern Radiator Valves

Traditional radiator valves are often mistaken for manual types, but are really just a visual style. They usually have a round or cross-head handle and are popular in period homes. Functionally, they're the same as manual valves.

Modern styles have a clean, streamlined look. They also function like manual valves but are designed to match contemporary interiors.

Materials, Finishes, and Design To Match Your Space

Valves can be functional and stylish. Here are popular finishes that work with different décor:

Chrome radiator valves. Polished and versatile, these pair well with towel rails and modern bathrooms.
Brushed brass or antique brass. Add warmth and elegance for vintage or industrial looks.
Anthracite and black radiator valves. Perfect for minimalist or modern interiors.
Satin nickel or stainless steel. Clean and subtle neutral options that work in most rooms.
White radiator valves. Blend in seamlessly with white or neutral radiators.

Technical Specs and Compatibility

Before buying, make sure your valves match your radiator and system. Here's what to consider:

Connection sizes. Most homes use 15 mm valves, which fit standard pipework and radiator threads.
System compatibility. These valves work with central heating systems, including hot water and dual-fuel setups.
Valve heads. TRVs come with different head styles — some are replaceable or lockable for extra control.
Heat output and balance. Lockshield valves help distribute heat evenly, which improves efficiency and comfort.

Choose the Right Radiator Valve for Your System

There's no one-size-fits-all answer — it depends on your home, your heating, and your style preferences:

Heating system type. Manual and TRV valves work with most central heating setups. Dual-fuel valves are ideal for towel rails in bathrooms.
Pipework layout. Straight valves work for vertical floor pipes. Angled and corner valves suit wall-mounted setups.
Room usage. Use TRVs in living spaces or bedrooms for better temperature control. Manual valves are fine for guest rooms.
Aesthetics. Choose finishes that complement your radiators, like brass with column radiators or chrome with towel rails.
Budget versus function. Manual valves are cheaper. TRVs and smart valves offer long-term energy savings.

Whether you're upgrading your heating system or finishing a renovation, the right valve makes all the difference in efficiency, control, and style. Shop the full range of radiator valves at QS Supplies — including TRVs, manual, angled, corner, dual-fuel, and more.

FAQs

Here are the most frequently asked questions about radiator valves:

What are the three types of radiator valves?
Can I replace a radiator valve myself?
What is the difference between thermostatic and manual radiator valves?
Can radiator valves be used with all heating systems?
Should I buy a thermostatic or manual valve?

Sarabeth Asaff
Sarabeth Asaff is a former kitchen and bathroom designer who now works as a home and garden industry writer and expert. She has a working knowledge of all areas of the home improvement industry, and specialises in functional design and material advice.