Oatey supply boxes can be used in commercial or residential applications that require supply valves and waste drain recessed into the wall. Available water hammer arrestor option provides water pressure shock arrestors required for installation on supply lines to quick closing valves. Available in fire-rated, round and other configurations. Features: Takes up less space and will fit almost anywhere WMOB made of PVC Brackets and faceplate made of HIPS 2 knockout drain caps 2 in. socket hubs Mountable with valves on top or bottom 2-piece valves come uninstalled or installed 2 support brackets Available in a wide variety of tailpiece configurations and packaging options