Question:
Is it permitted to wash negel vasser into a sink when there are dishes inside it?
Answer:
The Shulchan Aruch writes that the water of vegel vasser should not be washed onto the floor where people can walk because it has a ruach ra. R' S. Z. Auerbach however said that it is permitted to wash ones hands into a sink even of it has dishes etc. inside it, since it i the norm to wash those dishes before using them, and since they will be washed it is alright. As a side point if the water was spilled on to food, the food should be washed off three times.
Sources:
Ishei Yisroel 2 ftnt. 72, Halichos Shlomo 20 ftnt. 11.
