What Are TRVs and Why Fit Them?
Fitting TRVs (thermostatic radiator valves) is a rewarding DIY task, allowing you to take greater control over individual room temperatures and your overall heating spend. These clever devices replace standard radiator valves, automatically regulating the heat output of each radiator by sensing the room's air temperature. They then open or close the valve to maintain your desired setting, preventing radiators from overheating rooms and wasting energy.
The appeal is clear: greater comfort and reduced bills. Instead of the entire house heating up to one temperature, you can set different levels for different rooms – cooler in the bedroom, warmer in the living room. This targeted approach means your boiler doesn't have to work as hard or as often, leading to noticeable savings on your energy consumption. For many homeowners, fitting a TRV is one of the most cost-effective ways to make their heating system smarter and more efficient.
- TRVs regulate radiator heat based on room temperature.
- They offer improved comfort through zoned heating.
- Fitting TRVs leads to energy savings and lower bills.
- Installation is a feasible DIY project for homeowners.
When you’re looking at the various radiator valves available, understanding the difference between a standard lockshield valve and a TRV is crucial for making informed choices about your home's heating. The primary distinction lies in their functionality; a standard valve is either on or off, or manually adjusted to a fixed position, whereas a TRV actively responds to its environment.
The Basics of Fitting a TRV
Before you begin fitting a TRV, it's vital to prepare. The process involves draining your radiator system to prevent water spillage. You'll need a few basic tools: an adjustable spanner or a radiator spanner, a basin or bucket, some old towels or rags, and potentially a wire brush for cleaning. Ensure you have your new TRV and its matching lockshield valve ready. The angle or type of radiator valve you choose – perhaps an angled radiator valve if your pipework requires it – should match your existing setup to ensure a snug fit.
Fitting TRVs yourself empowers you to optimise your home's heating room by room, making it more comfortable and economical without professional help.
To start, turn off your central heating system and allow it to cool. Next, locate the drain valve at the bottom of your radiator and place your bucket underneath. Open the bleed valve at the top of the radiator to release air, then carefully open the drain valve to let the water out. Once the radiator is empty, remove the old valve. Clean the radiator's valve connection thread with a wire brush if necessary. Screw the new TRV body onto the radiator, hand-tight first, then use your spanner for a final, firm turn. Reconnect the pipework to the TRV and then attach the new lockshield valve to the return pipe. Slowly refill the system, bleeding any air from all radiators as you go, and check for leaks around the newly fitted TRVs.
Always turn off your central heating system and drain the radiator completely before attempting to change a valve to avoid water damage and personal injury.
Checking Compatibility and Types
Not all TRVs are universally compatible. Most modern TRVs use a standard M30 x 1.5mm thread, but older systems might use different sizes. It’s wise to check the threading on your existing valve. You'll also need to decide between an angled or straight radiator valve body depending on how your pipework connects to the radiator. For instance, if your pipework comes out of the wall and connects to the radiator vertically, a straight valve is usually appropriate. If the pipework comes from the floor or wall at an angle, an angled valve will be needed. Many affordable packs include both the TRV head and the matching lockshield valve, ensuring you have all the necessary components for a full replacement.
Next Steps and Considerations
Once your TRVs are fitted, set them to your preferred temperatures. A common starting point is '3' on a standard TRV dial, which often corresponds to around 18-20°C, but this varies by model. Experiment to find what works best for each room's use and your personal comfort. Remember that TRVs work by sensing room air temperature, so avoid placing them near heat sources like direct sunlight, draughts from windows, or other radiators, as this can give them inaccurate readings.
Fitting a TRV yourself can save on the cost of a professional installer, making it a budget-friendly upgrade. While the initial outlay for the valves themselves is modest, the long-term savings on energy bills can be substantial. Consider fitting TRVs to all radiators in rooms that are used regularly but don't need to be kept at the same high temperature as living areas. This includes bedrooms, hallways, and even unused rooms, preventing them from becoming heat sinks for the rest of the house.
After refilling your system, check each radiator for even heating. If one is cold at the top, it may need bleeding again to remove trapped air.
While most TRVs are designed for manual adjustment, the market also offers smart radiator valves that can be controlled via a smartphone app. These smart TRVs allow for even more granular control, scheduling, and remote operation, but they typically come at a higher price point. For those focused on affordability and straightforward functionality, traditional TRVs offer a significant improvement over basic radiator valves without the added complexity or cost.