Mosvalve
New York rats don't shower, they climb through pipes and into your toilet and take a bath.
Quite honestly I've seen more mice in my building than rats. I've had a few run out of my closet and disappear into the radiator. Cute little critters. I've caught a few in tupperware boxes and taken them outside. Can't kill the little beggars, mice are super intelligent and trainable so I don't consider them vermin.