Radiator keys are used to bleed radiators.
This process starts with first turning off your central heating. thus preventing more air from entering the system. The key is inserted into a valve and carefully turned anticlockwise (usually a quarter or half turn). The trapped air will start to escape with a hissing sound. When water starts to dribble out the air has been purged.
A cloth or small bowl should be kept underneath the bleed valve to absorb any leaking water. Also protect your hand as any escaping water may be very hot.
Tighten back the valve once done (be careful as water leaving the radiator may be very hot).
Turn back on central heating, check radiator heats up and no more water is coming from the valve.
This process starts with first turning off your central heating. thus preventing more air from entering the system. The key is inserted into a valve and carefully turned anticlockwise (usually a quarter or half turn). The trapped air will start to escape with a hissing sound. When water starts to dribble out the air has been purged.
A cloth or small bowl should be kept underneath the bleed valve to absorb any leaking water. Also protect your hand as any escaping water may be very hot.
Tighten back the valve once done (be careful as water leaving the radiator may be very hot).
Turn back on central heating, check radiator heats up and no more water is coming from the valve.
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