2'' drain opening fits PVC or ABS Schedule 40 DWV pipe. Easy to remove knockout, Patent Pending Hammer Valves. Snap-on Faceplate Frame accommodates up to 1'' drywall. Box made of high impact polystyrene. Top or Bottom Valve Mount. 4 support brackets included for mounting. Box Dimensions: 8-3/4''W x 7-1/2''H x 3-5/8''D. Faceplate Dimensions: 11-3/4''W x 10-1/8''H.
