can you ELI5 the physics of bleeding radiators on an apartment building?

vestmoria@linux.community to

No Stupid Questions@lemmy.worldEnglish · 2 months ago

I live on the 14th floor of a 30 story apartment building and so far, I’ve been bleeding my radiators myself.

This usually worked and after bleeding I had a fully functioning radiator, 100% filled with water.

However, last time I tried bleeding, it would only fill up to 25% of its volume, it’s like there’s no pressure in the circuit.

Am I doing something wrong?

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