Here is a recording i made of my toilet flushing. I used 3 microphones, one placed in the bowl, one place on the cistern and one placed about 2 feet away from the toilet. The mics were fed into a sound devices 664. The only post processing i did was mix the levels. Toilet bowl - shure sm57cistern - sanken cos11main mic - sennheiser mkh416.
The sound of a bathroom door opening and closing. If you use this in any project, and would like to credit me, it would be my honor, but if not it is fine as well. Hope this recording is useful.