Question 22) - We know that used water cannot remove a Hadath, but we want to know if it is pure or not?

A: It is pure if Hadath alone was removed with it, i.e. it was not used to remove real Najasah. It is however ghayr mutahhir (Cannot make pure), meaning that it cannot be used a second time to remove a Hadath. Thus if some drops of used water falls on clothing, water of vessels, they do not become impure.

~ al-Quduri ~