How to bleed an aluminium radiator on an open vented system?

Outlined below are the steps to follow to bleed an Afinia aluminium radiator that is connected to an open vented system – if you are unsure about what type of system you have or if you are unsure how to bleed your radiators correctly, please speak to your heating engineer.

1. Turn off any heating or hot water demand and check the lock shield and thermostatic radiator valves are both open.

2. Insert the radiator key into the bleed valve and place a cloth underneath to capture any water. Twist the radiator key anti-clockwise until you hear a hissing sound as the air escapes, close the bleed valve when water starts leaking from the valve.

3. If switched off, turn on any heating or hot water demands and return to radiator to re-check for leaks.

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