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Do systems lose pressure after refilling?

V

vonsworld

Joined
16 Sep 2007
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Hi
I recently drained my combi boiler to fit a new radiator. After the refill everything is working fine and I can find no leaks, but the pressure has been dropping 0.1 bar overnight when it's cold.

Is this normal for the first day or two? I read that these boilers have an air vent, so perhaps it's been venting air after the refill which might explain it?

Thanks for your feedback
Robin
 

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