Replacement Part: Allows you to replace or add a gate valve connection to your RV's black/grey water sewer tanksCompatibility: Fits onto 3-inch RV sewer pipes; The 3-inch diameter passage allows waste water to travel freely when the valve is openDurable Construction: Gate valve is constructed of durable ABS materialIncludes: (1) valve body with plastic handle, (2) seals, and installation hardwareEasy to Install: Connects to your RV's existing sewer pipes