I vote for none of the above. If it's a clogged drain, I can usually clear that myself. If not, I call the plumber and wash dishes (if it's the kitchen sink) in a dish pan and throw the water A. out the door or B. down the toilet

If it's anything major, I call the landlady first, then the plumber because she panics and makes me do it. In self defense I learned how to change washers on leaky faucets a long time ago when the bath tub started dripping, then leaking, then running like the Missouri River.