The Oatey Quadtro 1/4 Turn Copper Washing Machine Outlet Box is available for commercial and residential applications that require supply valves and waste drain recessed into the wall. 2 inch drain opening fits PVC or ABS Sch. 40 DWV pipe. Easy to remove knockout, Patent Pending Hammer Valves. Snap-on Faceplate Frame accommodates up to 1 inch drywall. Box made of high impact polystyrene. Top or Bottom Valve Mount. 4 support brackets included for mounting. Box Dimensions: 8-3/4W x 7-1/2H x 3-5/8D