sewer systems aren’t air tight either - they need to let gasses escape, so i think even without an airtight seal if we consider a sewer in general a pipe system of this category it’s fair to consider the connection between butt and toilet also part of this system
pupbiru@aussie.zone 1 year ago
sewer systems aren’t air tight either - they need to let gasses escape, so i think even without an airtight seal if we consider a sewer in general a pipe system of this category it’s fair to consider the connection between butt and toilet also part of this system