Featuring a wide-mouth opening for draining auxiliary appliances in the DWV (drain, waste, and vent) system, the Water-Tite Right-Hand-Drain Wide-Mouth Washing Machine Outlet Box is a reliable choice for connecting your washing machine to water lines and drain piping. This drain box features two valves and one drain outlet with an integrated drain-line partition that separates the washer discharge hose and the auxiliary discharge line. A discharge guide tube holds the discharge line firmly in place and protects against splashes. For easy installation across the stud bay, four mounting brackets are included with the outlet box. The one-piece molded test cap is specially designed to prevent it from falling down the drain after it has been knocked out. The Water-Tite Right-Hand-Drain Wide-Mouth Washing Machine Outlet Box comes with a faceplate that measures 13 inches wide by 8-5/8 inches high. Choose from a standard pack with an attached faceplate or a contractor pack with an unattached faceplate.