COMBO 4 in. x 3 in. OUTLET BLACK NDS

Use the Outlet Adapter with Internal Spigot to modify the invert height within the catch basin or to prevent floating grease from exiting the basin by attaching a fitting, such as an elbow, to the spigot. Works with 9 in., 12 in., 18 in., and 24 in. catch basin drains to connect basin opening to 3 in. & 4 in. single-wall corrugated pipes, sewer and drain pipes, and 4 in. Sch. 40 pipe and triple-wall pipe; connection to 18 in. catch basin requires additional Reducer Ring (1890); 24 in. catch basin requires additional Outlet Adapter with Reducer Ring (2410). Internal spigot connects to 4 in. sewer and drain fittings such as a 90° elbow or sanitary tee; turn elbow down for grease-trap applications, turn elbow up to adjust the invert height. Made of high-impact polystyrene (HIPS) treated with UV inhibitors.