a parts washing method which utilizes a centrifugal filter to substantially reduce the need to replace its solvent . solvent in a washing basin flows down a drain in the parts washing basin , through a screen to a centrifugal filter assembly , with a disposable filter in the filter receptacle of the centrifugal filter assembly . thus the contaminated solvent flows from the drain , into a disposable filter element located in a spinning filter receptacle , where centrifugal force draws the solvent back into the solvent container while the materials washed from the part remain in the disposable filter element . the clean solvent is collected in a reservoir and recirculated back to the wash basin .