SPILLING OUT THE WASH BASIN WATER
A person should be careful with the water that was used for Netilas Yadayim. Because this water was used to wash off "Tum'ah" (spiritual impurity), he should be careful not to step on it. The water should be spilled in a place where he will not use it, such as, down a drain. Also, he should not save this water to use for anything else. For example, he should not use that water for cleaning the bathtub or floor.