How to Bleed Home Radiators

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Bleeding a radiator means releasing air trapped inside. Radiators keep your home warm by forcing hot water through the system. Air in the pipes will block the water flow and will keep your heating system from working properly. If your heating system does not seem to be working properly, or your radiators are cooler on the top than on the bottom, then you probably have air trapped within the system.

Things You'll Need

  • Small bowl Cloth Radiator key
  • Locate the bleed valve on your radiator, typically square shaped and on the upper right side.

  • Obtain a radiator key if you do not have one. They are available at most hardware stores.

  • Turn off your heating system and allow the radiator to cool.

  • Place the cloth and bowl under the bleed valve to catch any water that comes out of the valve.

  • Put the radiator key into the bleed valve and turn carefully counterclockwise, 1/4 to 1/2 of a turn. The hissing sound indicates that air is escaping. Keep the valve open until the hissing stops and water begins to drip out.

  • Shut the valve when the water starts to flow.

  • Clean up any water carefully as it can be very hot.

  • Turn your heat back on.

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References

  • Photo Credit white radiator image by Ekaterina Sidorenko from Fotolia.com
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