NDS 1244 PVC Universal Outlet, 3-Inch and 4-Inch Connects NDS catch basins to multiple sized piping Designed to fit 9-inch , 12-inch , 18-inch and 24-inch catch basins Fits 3-inch and 4-inch corrugated pipe, sewer & drain pipe, sch. 40 pipe and triple wall pipe Built to last Designed for drainage