A pressure-relief assembly for adjusting pressure within a washing chamber of a washer. The pressure-relief assembly is composed of a housing having an opened upper end and an internal cavity communicating with a washing chamber of a washer. A valve assembly is moveable relative to the opened upper end of the housing between one of two opened positions and a closed position. The valve assembly has a first plate section dimensioned to overlay and cover the opened end of the housing. The first plate section has an opening extending therethrough. A second plate section is dimensioned to overlay the first plate section, the second plate section being moveable relative to the first plate section between a closed position and an open position.
