Spring is in the air – so apart from a good time to spring clean the house it is also a good time to bleed your radiators.

You should be able to do it yourself but if you have any doubts then consult a heating professional or your landlord.

A simple task to remove trapped air

Bleeding a radiator is a simple task that helps remove air trapped inside, allowing hot water to circulate more effectively and improving the efficiency of your heating system.

Before You Start
• First turn off your central heating. This ensures you’re not working on a hot system.
• Then allow the radiators to cool down. This prevents accidental burns.

Tools You Might Need
• A radiator bleed key (also known as a radiator key)
• A cloth or towel to catch any drips
• A small container to catch any water

Steps to bleeding your radiators

1. Locate the Bleed Valve

• Each radiator has a bleed valve. It’s usually located at the top of the radiator on one end.
• The bleed valve will have a square-shaped fitting that your radiator key can fit into.

2. Prepare for Dripping

• Place a cloth or towel beneath the bleed valve to catch any water.
• Have a small container ready to catch any water that comes out.

3. Open the Valve
• Insert the radiator key into the bleed valve fitting.
• Turn the key counterclockwise (left) to open the valve.
• You should hear a hissing sound as air escapes. Keep a firm grip on the key as water may start to trickle out.

4. Let the Air Out
• As the air escapes, you might notice the hissing sound change or stop.
• Once water starts to flow steadily without sputtering, that means the air is out.
• Quickly close the valve by turning the key clockwise (right) to tighten.

5. Check the Pressure
• After bleeding all the necessary radiators, check the pressure on your boiler. If it’s too low, you may need to repressurize it.

6. Repeat for Other Radiators (If Needed)
• If you have more than one radiator, repeat this process for each one, starting from the lowest level in your home and working upwards.
• Sometimes bleeding one radiator can solve issues with multiple radiators, so check the heat in all rooms after bleeding.

7. Check for Leaks
• After bleeding, check around the bleed valve for any leaks. If there are leaks, you might need to tighten the valve further or replace the seal.

8. Turn the Heating Back On
• Once all the radiators have been bled and you’ve checked for leaks, you can turn your central heating back on.

Tips for bleeding your radiators

• Regular Maintenance
Bleeding your radiators once a year or when you notice cold spots can keep your heating system working efficiently.

• Safety
Be careful when working with hot water and radiators. Use a cloth or towel to protect your hands.

• Consult a Professional
If you’re unsure about any step or if you notice leaks or other issues, it’s best to consult a heating professional.

By following these steps, you should be able to effectively bleed your radiators and improve the warmth and efficiency of your heating system.