This device should be installed at the furthermost downstream end of the supply pipe or fixture where temporary spillage due to critical flow pressure conditions can be discharged harmlessly.
" Bathroom" means a group of plumbing fixtures installed in the same room, consisting of a water closet or wash basin and either one bathtub or shower.
As usual, I needed to cut out a bunch of random stuff like how gnarly King Louis IV skincare routine was, to why the west just refuse to wash their butts with bidets for centuries.