How To Bleed Towel Radiators

How to Bleed Towel Radiators

If you have a towel radiator in your bathroom or any other room in your house, you may need to know how to bleed it. Bleeding a towel radiator is an essential maintenance task that helps to ensure it functions efficiently. Over time, air can become trapped inside your radiator, which can result in cold spots and reduced heat output. By following a few simple steps, you can easily bleed your towel radiator and keep it running smoothly.

Tools and Materials You’ll Need

Before you begin, gather the following tools and materials:
– A radiator bleeding key or a flat-blade screwdriver (depending on your radiator)
– A towel or rag to catch any water spills
– A small container or bowl to collect any water released during the process
– A pair of gloves to protect your hands
– A radiator valve or a thermostatic radiator valve (TRV) if needed (optional)

Step-by-Step Guide to Bleeding a Towel Radiator

Here’s a step-by-step guide to help you bleed your towel radiator effectively:

Step 1: Turn off Your Central Heating

Before you begin bleeding your towel radiator, it’s crucial to turn off your central heating system. This prevents hot water from flowing into the radiator, minimizing the risk of burns or scalds.

Step 2: Locate the Bleed Valve

Find the bleed valve on your towel radiator. It is typically positioned at the top, either on the left or right side, and often covered by a protective cap. Use your hands or a cloth to remove the cap and expose the valve.

Step 3: Prepare Your Tools

Ensure you have your radiator bleeding key or flat-blade screwdriver ready. Choose the appropriate tool based on the type of valve your radiator has. If you’re unsure, consult the radiator’s manual or consult a professional.

Step 4: Protect Your Surroundings

Place a towel or rag beneath the bleed valve to catch any water spills. This prevents staining on your floor or carpet and makes cleaning up easier.

Step 5: Open the Bleed Valve

Insert the radiator bleeding key or screwdriver into the bleed valve’s square or slit-shaped hole. Slowly turn the key or screwdriver counterclockwise (left) by about a quarter to a half turn. You will hear a hissing sound as air begins to escape from the radiator.

Step 6: Release the Air

As the air escapes, you might notice some water dripping from the valve. Use your container or bowl to catch the water and prevent any spills. Wait until a steady stream of water flows out of the valve without any trace of air bubbles. Once all the air is expelled, close the valve by turning it clockwise (right) and tighten it gently.

Step 7: Check Your Radiator Pressure

After bleeding your radiator, it is a good idea to check the pressure in your central heating system. Consult your boiler’s manual or seek advice from a professional to ensure the pressure is at an appropriate level. If necessary, use a pressure gauge or contact a plumber to assist you.

Optional Step: Adjusting Radiator Valves

If your towel radiator has additional valves, such as thermostatic radiator valves (TRVs), you might want to check if they are functioning correctly. Make sure the valves are set to an appropriate temperature and not obstructed by furniture or curtains, as this can affect heat distribution in the room.


Bleeding your towel radiator is a simple yet vital procedure that allows trapped air to escape, ensuring efficient heat distribution and avoiding cold spots. With the right tools and a step-by-step approach, you can easily bleed your radiator and maintain optimal functioning. Always remember to prioritize your safety by turning off the central heating system and using protective gear. If you are uncertain or uncomfortable performing the task, it is always best to seek assistance from a professional plumber or heating engineer.

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