They 'flushed' impurities from the system. = They 'flushed' impurities out of the system.
She published her first novel while still 'in the flush of' youth. [=while still young]
The committee succeeded in 'flushing out' [='finding'] several good candidates.
(..) father's ashes if you say then i will also bring your bones i will count till dont try to scare us. Shoot us raju flush it we will go to hell but we will bring your father with us we bring the empty bowl, its empty we will empty it (..)2009 3 Idiots