a wash / rinse system for a drawer - type dishwasher includes a wash mechanism having a paddlewheel and a spray bar mounted in a washing chamber of the dishwasher . the spray bar includes at least one nozzle that is positioned so as to deliver a jet of washing fluid onto a deflector member provided on the paddlewheel . upon impacting the deflector member , the jet of washing fluid diverges into streams of washing fluid which are sprayed onto articles positioned in the washing chamber . preferably , the spray bar includes a plurality of nozzles which direct multiple jets of washing fluid onto a corresponding plurality of deflector members . the paddlewheel is mounted so as to create random streams of washing fluid that are sprayed into the washing chamber to combine with washing fluid emanating from a lower wash arm to clean articles in the washing chamber .