How do self-bleeding radiator valves work?

radiator valve

Radiators need a bleeding now and then. If you don’t bleed them, they can start to feel cold at the top, while they’re hot at the bottom. This is because air has been trapped inside. There may also be a loud knocking sound audible when you turn it on, which indicates the same thing.

When air builds up in your heating system, it becomes much less efficient. The heated water can’t travel as effectively due to the air in the way, which is why the radiator will feel cold in parts. Furthermore, the mix of air, water, and iron can cause corrosion, which could end up being very costly to repair.

Bleeding the radiator helps that air escape, but it can be a messy DIY task that can take some time to handle yourself. Self-bleeding radiator valves take that burden off your shoulders, ensuring an efficient heating system with little work from you.


How do self-bleeding radiator valves work?

The valve is built to sense when air has built up, and opens when it does, so that the air can get let out. However, while manual bleeding can also involve letting out the water in your radiator, self-bleeding valves shut when sensing water to prevent it from leaking. At first, it might seem like the valve is taking a while to do its job, since it’s continuously working but if you’re patient, it will thoroughly bleed the radiator. After that, it manages the radiator constantly, letting out air before it has the opportunity to build up again.

Finding the right type and number for your needs

Broadly speaking, there are two types of self-bleeding radiator valves. One is designed for more modern radiators, and one for older types. If you’re uncertain which is the correct fit your radiators, Radiator Valves Online can help you, so don’t hesitate to get in touch.

You may also wonder how many valves you need to effectively manage all the radiators in your home and keep them as efficient as possible. In most cases, it’s wise to have one valve upstairs and one valve downstairs, with them fit to radiators that feed directly from the boiler. If there’s a specific radiator that is causing problems more than most, consider fitting a self-bleeding radiator valve to that one.

In most cases, it’s not necessary to fit these valves to every radiator in the home, since letting the air out of one or two will keep air out of the others, as well. However, if you have a larger house, you might find that two aren’t enough.

What if I am still getting problems?

If you have a larger home and two valves prove to not be enough or there’s one radiator that is still being a problem, then adding another valve to that specific radiator or more frequently in the home could help.

Otherwise, there’s a chance it’s not a problem that can be fixed by bleeding. If that happens, get in touch with your local heating expert to take a closer look.

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