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Disabling these cookies will not prevent users from using the site but may negatively effect their experience with regards to convenience. Click here to learn about cookies. The valves on the radiator are devices that we tend to ignore when the radiator is working correctly.
However, the radiator valve is an essential and integral part of the radiator and the central heating system. The main reasons why a person is interested in understanding what radiator valves are and what variations are available is normally due to either a fault with the central heating system, or because they are ordering new radiators and are trying to understand what they will need to buy. In very simple terms the radiator valve helps control the amount of hot water that enters and leaves the radiator.
By controlling this flow of water, the heat that the radiator can generate is controlled. Valves are located on the bottom of the radiator where the pipes come into and exit the radiator. These are normally situated at the bottom left and right of the radiator, but some radiators have valves that come into the centre of the radiator, again at the bottom.
A common problem may be a cold room. Although the radiator is blazing hot, you may still want to go to the thermostatic radiator valve and open it up more. Adjust the TRV if you feel that the radiator remains cold. Many thermostatic radiator valves nowadays are bidirectional, and you can install them to either the flow or the return pipe of your radiator. However, we would advise you to fit the TRV on the pipe that carries water to your inlet valve — the flow pipe.
Wonder why? Well, if you mount a non-bidirectional thermostatic valve to the return pipe, you would later discover that a noisy, vibrating sound comes out of it while the water rushes through. Also, in a property with 2 rooms, one requires a room thermostat that controls the entire heating system and a single radiator.
The other room has a second radiator with a TRV attached to it. Refrain from fitting a TRV on the radiator that has the room thermostat.
The room thermostat needs to have an exact reading of the maximum capacity of the heating system. Therefore, the radiator which has a room thermostat should have a fully open lockshield valve. A heating engineer can survey your home and offer professional expertise on the matter. Bleed your radiators with a bleed key and a hose. Once the water stops running, you are ready to remove the old valve. Then in less populated rooms like spare bedrooms or exterior communal areas, you can set the TRV even lower and avoid heating rooms not used as often by your family.
Thermostatic radiator valves show their economic potential by enabling you to save money and fuel while enjoying a comfortably heated home.
However, it is possible to encounter issues. Draughts or ventilation mess with the valve, causing much hotter or colder readings than reality. And these simple devices can influence big knock-on issues depending not only on if they break but when they break. If a thermostatic radiator valve stops working when turned off, the radiator will not switch on and can cause condensation, mould, frost damage and other cold-based issues.
And if your TRV breaks when on, it will pump endless hot water through your radiator and cause serious overheating. For this reason, perform frequent TRV checks to ensure accurate ambient heat detection, and do not leave them on high settings when out of the house for a significant period of time.
Instead of preventing the condensation that often hinders bathrooms, the TRV will shut off and do nothing. Another consideration is to not fit thermostatic radiator valves in the same room as your principal thermostat. This unit connects directly to your boiler and so you will inadvertently create a competition between your TRV and central thermostat. In this monumental battle, the only loser is the homeowner!
Thermostatic radiator valves have come a long way since the basic wax valves. Now, we recommend TRVs to most of our customers due to their advanced technology, reliability and foolproof set-up. Behold, the electronic thermostatic radiator valve…. Leading home heating brands like Honeywell have taken the TRV further than ever. A battery-powered thermostat with more advanced heat detection ensures the TRV performs with greater accuracy than any traditional thermostatic radiator valve. Electronic TRVs can also be connected to increasingly popular intelligent heating systems.
With the ever-advancing possibilities of smart home systems and Internet of Things, you can now manage your TRVs using your smartphone from the comfort of your sofa — or even while travelling — to keep your home heating ticking safely at all times. Next, we cover the two main thermostatic radiator valve issues and how to fix them. If you need more in-depth advice, our friendly team is always available by phone for support.
I have always worked with heating systems on the basis that a TRV or standard valve is fitted to the flow side of the rad and lockshield on the return. Is this correct? Surely this will make balancing a nightmare if not impossible?
Thanks in anticipation! Recently had a new boiler fitted and have found out that the flow is the wrong way round - in at the lockshield valve and out at the thermostatic valve. The installer has just told me that with a combi boiler the flow direction is immaterial.
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