this post was submitted on 30 Nov 2023
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That air pressure doesn’t mean anything without aerosolized particles. High rate commercial toilets create those particles and spew them out at like 6 ft/sec. Draining the tank into the bowl does not create much except maybe a few larger droplets once the drain takes most of the contents that can’t go as far, and that is mitigated by closing the lid.
Correct which is why in addition studies show that having the lid down increases the concentration of those aerosolized bacteria and increases the distanced traveled while also allowing them to linger in the air for up to 11minutes longer. The lid down causes the particles to break up into nano particles which are not visible, but linger longer and spread farther.
https://microbiologysociety.org/news/society-news/does-putting-the-lid-down-when-flushing-the-toilet-really-make-a-difference.html#:~:text=The%20research%20found%20that%20putting,the%20bacteria%20in%20these%20droplets.
It appears they studied a shared university toilet, likely not a common household unit. The further study that it references I found here
This is referencing hospitals, again not home toilets. I’ve yet to see any actual info on standard low pressure toilets.
A shared university toilet can still be part of a house or low pressure system. I've yet to see public restrooms which had a lid for the toilet itself, outside of low pressure toilets in communal housing. If you can link to where they clarified the shared university toilet was high pressure, I will stand corrected.