How To Bleed A Radiator

The purpose of bleeding a radiator is to let out air that has become trapped inside your system, it's a common issue in un-vented heating systems. Trapped air prevents water from heating your whole radiator, creating cold spots. Sometimes you will hear a flowing or clucking sound coming from your radiator, this is also a good indicator that you need to bleed your radiator.

If you touch the top section of your radiator, does it feel cooler than the bottom half? This means your heating system is working inefficiently. As your boiler works with your radiators, you’re paying for heating but not enjoying the benefits. Fortunately, you can easily bleed your radiators yourself, making your home cosy and warm.

In this guide we’ll show you how to bleed a radiator in seven easy steps; increasing the efficiency of your central heating, cutting your energy bills and making your home warm during the cold seasons.

What will I need?

  • Grips

  • Vent Key

  • Cloth

Step by step instructions

  1. Check the type of boiler and system. Always check prior to starting!

  2. Refer to the manufacturer’s instructions for filling the system (pretty please!)

  3. Grab a radiator key and engage this on to the air pip.

  4. Place cloth around the air pip to catch excess water.

  5. Turn anticlockwise to release air.

  6. Turn clockwise to close the air pip once water is present.

  7. Following instructions from manual, top-up heating as required.

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