Posted on: 2014-07-26 10:28:44<< Older post Newer post >>There are times that radiators feel cold at the top and warm at the bottom. If this has happened to you, then, it is highly likely that the problem is caused by air that has managed to enter and then get trapped in your radiator. The air takes the place of the hot water and stops the radiators from becoming completely hot all over. In this case the radiators will need to be bled.
Southwark Plumbers carry alll the tools to fix radiators and heating systems. All domestic radiators have a bleed valve fitted. They are usually fitted sited on the top corner of the radiator, either left or right side. There is a recess with a square metal block sitting centrally inside. This is made so that a bleed key can fit over it and then can be opened or closed. The bleed key is small and has the correct size and shape of recess so it fits to the square block. A
Southwark Plumber has lots of experience of plumbing issues. Bleeding a radiator is quite a straightforward process. Under normal circumstances it will be a matter of opening a small valve on your radiator to allow any trapped air to escape. Here is a basic guide on how to do this. Isolate the boiler and the circulating pump as they can have a permanent live feed. Fit the bleed key on the block and turn very slowly anticlockwise for only ¼ turn. This is normally all that is needed to begin releasing the air. Always make sure the radiator bleed key remains on the block to close the valve when all the air has gone. If there is no water dribbling out following the air, then, you need to check that the feed and expansion tank in the loft is empty.
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