The bathroom's wooden cubicles are worn and ill-maintained, and even the stone sinks are chipped. Like many of Hogwarts' rooms - including the opulent prefects' bathroom - the room is candle-lit, but the candles are in holders rather than a chandelier and there are not enough of them to light the room properly.
The sinks, which form a row under a large cracked and spotted mirror, have copper taps, one of which has a tiny snake scratched on the side. Apparently that particular tap is a complete dud when considered as part of the plumbing; it serves another function