What is a radiator spanner and air release key?
What is a radiator spanner and air release key? |
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The parts of a radiator spanner and air release key are:
The handle can be the short or long shaft, depending on what radiator part is being adjusted. |
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The handle can be smooth, like this, or the hex shape can be continued along the length of the tool. | |||
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The short end of the tool doubles as a key for internal hexagon valve tails and and internally lugged valve tails by means of the grooves on opposite sides. | |||
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At the other end is a bleed key for standard 5mm square-headed bleed screws. | |||
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These keys are usually made from zinc-coated or galvanised mild steel or high tensile steel.
High tensile steel is the best option when removing or fitting valve tails as quite a lot of pressure might be required. High tensile steel is much stronger than mild steel and will not distort or break easily. |
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The combination of bleed key and valve keys is handy because you need to bleed a radiator after replacing valve tails.
For step-by-step guides to using this and some other keys, see and |
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