The A663 dialysis box is a fully recessed stainless steel boxes designed for use with dialysis machines which utilize solutions that aggressively attack common steel, brass, iron and other stainless steel. This box is constructed of heavy gauge, type 316, stainless steel. All seams are continuously welded to form a one piece unit. Interior of the box is bead blasted for a clean surface. The welded hose bracket will hold two discharge hoses. The tailpiece waste connection is heavy gauge and provides primary discharge for the unit. The valves are polypropylene and are securely anchored in the unit. A flushing nipple is provided for installation in the valve outlet when the lines are flushed into the waste receptor.