The Oatey Quadtro Washing Machine Outlet Box is made for commercial or residential applications where supply valves and waste drains are recessed into the wall. The proprietary lock and load valves enable left, right or center positioning of the drain pipe. This easy-to-install box includes all necessary support brackets to mount the water supply valves from the top or bottom. Oatey products have earned the trust of plumbing professionals for over 100 years.